T+A R 2500 R multisource receiver

The hi-fi receiver has been many different things. Early examples, like the Harman Kardon "Stereo Festival" TA-230 from 1958 (said by modern-day Harman/Samsung to be the first stereo receiver; footnote 1), featured separate FM and AM monophonic tuners that could assign a speaker to each if you wanted to listen to what was then a fad: stereo broadcasts over two stations (left channel over FM, right over AM, for instance). Standardized FM stereo broadcasting began in 1961, and by then, receivers had evolved into large, complex, nearly complete stereo systems; an example of that was the Fisher 800 (footnote 2).

By the 1970s, the focus of receiver development and manufacturing had shifted to Japan. The era of features-laden "Silverface" receivers peaked with the massive Technics SA-1000 (footnote 3). That behemoth was just over 2' wide, nearly 2' deep, about 7.5" tall, and weighed 87lb. It was capable of 330Wpc into either 4 or 8 ohms, and its linear power supply sported four specially made 18,000µF filter capacitors. Among its many innovative features were LED level meters (the newest thing in 1977) and a parametric midrange control. Technics claimed a frequency range of 5Hz to 91kHz and a signal/noise ratio of 115dB, A-weighted. In short, the SA-1000 was the king of the Silverface mountain.

The point of a receiver has always been to combine as many music-listening sources in a single chassis as possible—with preamp functions and amplification. Back in analog days, that meant on-board FM and usually AM; a phono preamp (sometimes two); occasionally a tape-head preamp; full input switching, volume control, and tone controls, akin to what you'd find in a standalone preamplifier; and a power amplifier, often with outputs for two sets of speakers. Back then, buyers brought a "record player" (turntable, tonearm, and cartridge—sometimes a record-wrecking changer) and maybe a tape machine to the party, plus speakers. All other sources and functions were in the receiver.

We of a certain vintage remember how important FM radio was in the days before it was conglomeratized, genericized, automated, and ruined. In recent years, streaming has replaced a lot of radio listening. (In fact, we can stream many of the world's remaining radio stations via the interwebs, no longer slave to conglomerate ownership of the local airwaves or the vagaries of antennas and lines of sight to towers.) In place of a collection of records, one might have a network-attached server (NAS) with a digital library, or a portable SSD or thumb drive—or merely a playlist set up on one of the major music-streaming services. It might be nice if the receiver can connect to a modern TV, which will have either TosLink or HDMI-ARC output, or both. For those of us who still own a bunch of CDs, we might as well include a robust DAC—and maybe even a built-in CD transport.

The R 2500 R
Throw in FM analog and digital tuners, and voilà, you have the R 2500 R, the "21st Century Receiver" from T+A Elektroakustik of Herford, Germany, southwest of Hanover. T+A (footnote 4) is a full-line company with some 100 employees and annual sales of €15–€20 million, according to American press-relations man Jim Shannon. T+A makes everything from turntables to headphones and loudspeakers and all the electronics in between including amplifiers, disc players, turntables, streamers, and DACs. As the name implies, the R 2500 R is in the R Series, which sits just under the top-line HV Series.

Interesting aside: Shannon told me his father's Fisher 800B receiver was his gateway into a lifetime of loving music and hi-fi gear. The R 2500 R device has a dense feature set, a complex wireless remote control, and a robust phone/tablet app. It may take a buyer weeks or months to check out everything it does and every way to tweak the output sound. If you have no vinyl, the R 2500 R is all you need—just add speakers, and make them full-range and high-fidelity because (though I'm getting ahead of myself ) the R 2500 R excels in all its audio duties. It will set you back $18,880; with an optional phono preamp (either MM or MC), make it $19,800 (footnote 5).

To summarize, here is everything you can listen to using the R 2500 R: radio (FM, digital FM, internet-streaming), CDs (through the slot-loading built-in player), computer audio (through the built-in USB DAC), streaming services (via hard-wired Ethernet or Wi-Fi), TV sound (optical or HDMI-ARC digital through the DAC or through one of the three analog inputs), digital files from a thumb drive or hard drive (connected via USB), or vinyl (using an external preamp into one of the analog inputs or with the optional MM or MC phono preamp, not included in the review unit). You can use it as a computer "soundcard" via a USB connection and T+A's software driver (not necessary on Apple devices). Analog components like external phono preamps or tape machines can plug in balanced or single-ended. The R 2500 R is controlled (somewhat, with a lot of menu scrolling) by the front panel, or by its sturdy metal many-buttoned remote, or, perhaps optimally, via the T+A Navigator G3 phone/tablet app. With so many modes, sound sources, and options, the phone's touchscreen is the ideal user interface.

Visually, this is a smart-looking aluminum-cased component with front-panel power-level meters and a display that shows which input and what music is playing (artist and song-title information for streaming from internet services or NAS-based or USB-drive files). The rear-panel connections are clearly labeled and easily accessible. The top panel has a circular glass "portal" to see a portion of the inner circuitry. The two "mini traffic cone"-shaped Wi-Fi/Bluetooth antennas can be placed on top of the R 2500 R or on a shelf above; they include a foot or so of wire to allow some flexibility. Included in the box is a T-shaped FM antenna and an adapter for the 75 ohm socket on the back of the unit. Also in the box is a complete printed manual.

One feature not available at the time of review was Roon certification. The manual and website state that the unit is "Roon Ready," but pull-down text on the website indicates, "As the Roon certification process is not yet complete, the R 2500 R cannot be operated via your Roon system at the moment." Roon control will be helpful to at least some potential buyers, because the T+A app isn't made up of the most user-friendly code ever written (more on that later).

Controls and circuits
In the analog domain, there are bass and treble controls, accessed from menus via the front panel or remote and included in the app. Both are broad-spectrum (low-Q). The bass control is centered at 300Hz, treble at 3kHz. Their range (–6dB to +8dB) is moderate compared to some tone-control schemes (footnote 6).

The volume control is an analog, stepped resistor/relay design with uniform 1dB steps from 0 (no signal) to 85 (maximum output level). There is an analog low-pass filter on the output, switchable between 60kHz and 120kHz. I admit not hearing any differences between the two filters. Shannon recommended 120kHz, so that's where I kept it.

The digital circuitry is mostly T+A designed and built. The DACs for PCM and DSD bitstreams are independent. The DSD DAC is T+A designed and made. Shannon described the PCM DAC like this: "[It] utilizes a dual/quadruple set of Burr Brown delta sigma processors but bypasses most of the functions, other than the true digital conversion. After working with the Burr Brown engineering group for nearly 30 years, we have learned to use the Burr Brown chips' Operation Mode, conversion only, which allows us to perform all high-speed upsampling, filtering, and input handling in our application-specific signal processing architecture. This processor is the center of the digital system and takes the data from the various external and internal digital sources and either passes it on unprocessed as a native DSD bitstream to the True One Bit converter or passes PCM data on to the Quadruple Converter after processing by our proprietary oversampling algorithms."

The R 2500 R offers six digital-filter options for PCM and two for DSD, all designed and implemented by T+A. JA's testing will illustrate some or all of them. I found the "Bezier" oversampling filter best for PCM; it's described in the manual as "offering perfect 'timing' and dynamics." With DSD streaming, both filters sounded about the same, with maybe a slight edge to "DSD2," which is described as "two shorter filters operat(ing) in parallel," which "produce even lower distortion than DSD1 mode." Switching between filters can be done via menus using the remote control and front-panel display, or with less effort using the app.

As I referred to the manual to harvest filter descriptions, I was reminded again how many controls and features the R 2500 R includes. This is praise; a receiver of any era should be nearly or entirely a full-featured audio system in a well-built single component. There is not enough space in this review to go into every nook and cranny of the R 2500 R's capabilities, so I strongly urge would-be buyers to explore the website and download the user manual (link on the webpage; tinyurl.com/3fmmhhc4).

The power amplifier in the R 2500 R is class-AB. Shannon's description: "Our R series is now over 25 years old, and this is the most recently refined iteration of a fully discrete (no op-amps), very wide bandwidth (linear to over 100kHz), dual mono, fully balanced, temperature compensated (using thermal sensors to raise and lower bias voltage to keep everything in the most linear, low distortion portion of the circuit's performance) amplifier. The amp is powered by a T+A-designed fully discrete switching power supply. We feel that we can get higher current and power (into) a relatively small chassis using a switching supply, but the available OEM supplies are all designed for computer use and far too noisy for audio applications. We spent a few years developing a discrete switching circuit that develops very high current with very low noise and offers stable power-factor correction for excellent performance in nearly any AC grid."

Unpacking and setting up: a process
So far in my young career as a Stereophile reviewer, this unboxing and setup was the most complex I've experienced. The R 2500 R is double-boxed, with several pieces of packing material between the inner box lid and the somewhat large and heavy receiver, which is in a fabric bag. It was awkward for one person to remove and unbag it without tipping it over. Then there's a sub-box full of accessories: the two Wi-Fi/Bluetooth antennas; remote control and batteries; heavy-gauge power cable; and FM T-antenna (the manual clearly states that if you're serious about FM, you'll want a better antenna, but this will get you started).

Once free of its packaging, the all-metal, all-black box practically screamed "solidly built!" The fit and finish are refined and look modern-functional. The front panel's buttons and knobs feel and act like they'll hold up to a lifetime of use. The rear panel connectors are topnotch.


Footnote 1: See tinyurl.com/2p9drpur and tinyurl.com/3t8d7cc3.

Footnote 2: The Fisher 800C, from 1962, included most of the features that came to be associated with top-line stereo receivers for decades to come. See tinyurl.com/7ws4wefz.

Footnote 3: See tinyurl.com/2db3aymx.

Footnote 4: That's a plus sign and not, please notice, an and; the company can be a little touchy about that, and who could blame them?

Footnote 5: If that seems like a big number, consider that in today's dollars, adjusted for inflation, when it was new, the Technics SA-1000 cost roughly half as much as the T+A does.

Footnote 6: See tinyurl.com/237h5pm6. The PDF at the link shows the relationship between audio frequencies, instruments, and tone bands (bass, midrange, treble, etc.).

COMPANY INFO
T+A elektroakustik GmbH & Co. KG
Planckstrasse 9-11
D-32052 Herford
Germany
info@ta-hifi.de
+49 (0) 5221-7676-0
ARTICLE CONTENTS

COMMENTS
justmeagain's picture

plus bonus CD player. But almost $20,000? I don't think this will make much of a dent in the receiver market.

georgehifi's picture

Expensive but "everything" in one box even a CD transport and DAB+, as it can play SACD (DSD) files, it's a pity the transport couldn't have had SACD payability also or does it?
Did I miss it, or is there no reference to what amps are used inside, https://ibb.co/Qd1bwym be nice but don't look like it if they were my fav class-d, Hypex NC500's. They don't look like anything Purifi make either, which they used in their power amps.

Cheers George

JohnnyThunder2.0's picture

A/B.

supamark's picture

It shows the class B crossover distortion at 50 Watts. Also, that's a lot of global feedback in the amp circuit (figues 5 and 6).

jtshaw's picture

I have a T+A Cala all-in-one receiver paired with Wharfedale Denton speakers, using it as an office/bedroom system. I stream Qobuz, play CDs, listen to FM radio, FM-HD radio, and occasionally Internet radio. FM-HD has proven a great source for late night listening when our local Claasical station broadcasts the WFMT Jazz Network on their HD-3 channel.

I’ve been in this audiophile hobby for 35 years, and the Cala may be the single most remarkable piece of kit I’ve had. The synergy with the Dentons boggles me. The Cala is also 1/3 the price of the 2500 R reviewed here. T+A builds great equipment, so I’m confident that the 2500 R with more power, features, and refinement is also a worthy piece of kit. It would likely serve as the centerpiece of a Big Rig. Even so, the Cala is so good that I suspect for most households it would suffice.

georgehifi's picture

Nothing I could find says it an A/B amp, even better if it was, but most of their stuff these days is Class-D

From the T/A website, nothing about it being Class-A/B
"Power amplifier
Output power (RMS) per channel
250 watts @ 4 ohms
140 watts @ 8 ohms
Frequency response +0 /-3dB
0,5 Hz - 150 kHz
Slew rate
60 V / µS
Damping factor
> 65"

The only indication from those "manufacturer specs" if they are to be believed is the -3db at 150khz could make them Class-A/B, I don't know of any Class-D's that go that high
JA measured the power amp section of this at -3db at 98k so who knows.

Admittedly it does have a "sort of" Class-A/B 10khz square wave with just a slight telltale leading edge bump, thatcould also be left because of the Audio Precision's auxiliary AUX-0025 passive low-pass filter, which eliminates noise above 200kHz. Used in these measurements to eliminate all the switching noise ringing on the leading edge of the square wave at the speaker terminals.

Real Class-A/B square wave https://ibb.co/9hmqVnh

Class-D square wave (no AP test filter on the speaker output) https://ibb.co/zRx9nsD

Class-D square wave (with AP test filter on the speaker terminals) https://ibb.co/pdmkHT8

Cheers George

John Atkinson's picture
georgehifi wrote:
Nothing I could find says it an A/B amp, even better if it was, but most of their stuff these days is Class-D. . . The only indication from those "manufacturer specs" if they are to be believed is the -3db at 150khz could make them Class-A/B, I don't know of any Class-D's that go that high JA measured the power amp section of this at -3db at 98k so who knows.

The R 2500 R's output stage operates in class-AB. It is housed in a fan-cooled module at the right-hand side of the chassis, beneath the driver-circuit printed circuit board.

georgehifi wrote:
Admittedly it does have a "sort of" Class-A/B 10khz square wave with just a slight telltale leading edge bump, thatcould also be left because of the Audio Precision's auxiliary AUX-0025 passive low-pass filter, which eliminates noise above 200kHz.

I didn't need to use the AP AUX-0025 passive filter when I measured the T+A receiver.

John Atkinson
Technical Editor, Stereophile

JRT's picture

This article's specifications webpage mentions, "Warranty: 3 years after shipment from factory, limited."

funambulistic's picture

... on the text readout of the display? "Music is through"

"Music is done - it is only equipment now."

/s

JohnnyThunder2.0's picture

This is just what is written here. If JA or someone got it wrong I dont't what to say
Sidebar 1: Specifications
Description: Solid state stereo receiver with HD Radio/FM tuner, optional phono preamp (MM or MC), on-board DAC/streamer, full-function preamp with analog bass/treble controls and stepped-resistor relay volume control, class-AB amplifier

georgehifi's picture

Ah! missed that as it's the manufacturer's propaganda, and the last thing I read of a review if I ever do.
Then it is an Class-A/B poweramp amp section, which to me makes it even better again.
(Still too expensive, and the transport should have had SACD ability)

Cheers George

Jeff_D's picture

Seems like a high-end "bargain" if you carefully choose speakers that aren't difficult to drive. SACD would be nice but I get it, kinda niche these days.

DaveinSM's picture

Nineteen grand is a lot of money for a little T+A, and twenty if you want to play records.

People who are in the market for one of these are not audiophile purists, and probably those short on space for whatever setup this is going into.

140 WPC @ 8ohms is acceptable, but sort of underwhelming, again, at this price point. So you’d think T+A would be hanging their hat on robust build quality, but at 30 lbs and with all these features and amplification incorporated in a decent sized chassis, this is a surprisingly and concerningly lightweight design.

One would think that it couldn’t cost too much extra for them to opt for an SACD capable transport in this thing. It would certainly broaden its appeal as a true one box solution. As it is, the exclusion of SACD just limits it, and for probably nominal cost savings.

georgehifi's picture

"but at 30 lbs and with all these features and amplification incorporated in a decent sized chassis, this is a surprisingly and concerningly lightweight design."

Would have been nice and far heavier if it had a linear powersupply, instead of that SMP one.

Cheers George

cundare's picture

I generally try not to disparage other users’ postings, but there is so much misinformation and so many unwarranted, conclusory opinions about the R 2500 R in this thread -- stated with such self-important authority! -- that I couldn’t let it all go unchallenged. I hope nobody takes personal offense b/c none is intended.

As an early purchaser of the R 2500 R, who has a half-century of audiophile credentials and a solid engineering background, I think I have the credibility to address the most misleading of these assertions, one by one.

To wit:

i) As John clarified, no, this isn’t a Class D amplifier, and that's stated right in the review and on the T+A Web site. My advice: Run from anyone who claims to know anything about this receiver (or T+A) but doesn't even realize that it incorporates an A/B topology.

ii) I take exception to the comment that this is not a product for audiophiles. My audiophile credentials go back to tube-rolling Dynaco kits & Quad monoblocks in the 1970s, I’ve restored ESLs by hand, and currently own a $50K+ system that includes tens of kilobucks worth of power conditioning and cabling. So I think I belong to the club. And to my ears, the R 2500 R's SQ is stunning for a sub-$20K component, the best I've experienced in my home, and even without the receiver’s extraordinary functionality, would easily justify its price tag. Period. This shouldn't be a surprise to anyone familiar with T+A, one of the most respected manufacturers of high-end DACs, speakers, and amplifiers throughout most of Europe. The R 2500 R contains, among other things, a 2023 update to the company's outstanding $5-8000 dual-format DACs (DSD content gets its own signal path and format-specific processing), an only slightly compromised version of its $10K headphone amp, and the same sophisticated approach to amplifier design that underlies T+A's much pricier models. It’s preposterous to suggest that this is a mid-fi "lifestyle" product simply because it offers the features & connectivity necessary to make it a good choice for reproducing both stereo sources and multi-channel content like SACD, DVD, Blu-ray, and streaming 5.1. As companies like Trinnov demonstrated long ago, being home-theater-ready is hardly impossible for a true audiophile product.

iii) I thought Tom Fine gave short shrift to his evaluation unit (although I realize that it’s hard to evaluate EVERY feature offered by a box like this), but nonetheless, he did rave about its sound quality, comparing it favorably to his $20K+ reference DAC, and concluding that it delivered the type of performance you'd expect at a $19K price point. I personally think my unit sounds better than that through my Harbeth system, but I'm not gonna press the point; we all know that differences in room characteristics and system configurations always mean that YMMV. But I think you get the point.

iv) The fact that T+A packed so much functionality into a package weighing only 31 pounds is a feature, not a bug. Achieving this goal does NOT mean that the R 2500 R suffers from a compromised power supply or shoddy build quality. When I disassembled my unit (yeah, I’m an under-the-hood type guy), I was impressed by just how solidly it was built. High quality pots & switches, heavy-duty milled-aluminum chassis, excellent quality PCBs & circuitry (audiophile-grade passive components, ceramic SMF chips, etc.). Similar to what you'd expect from a 5-figure box sold by Levinson or McIntosh. And c’mon, T+A isn't the only company that's figured out how to package a 100+ wpc Class A/B amp into a sub-40lb box without compromising sound quality -- think Ayre, Benchmark, Bryston, Chord, etc. – although it is the first to combine this level of SQ, functionality, build, and connectivity in a box this light.

v) And, oh yeah, the R 2500 R’s power supply is hardly “compromised”. In fact, it’s one of the most sophisticated hybrid PSs on the market (at least in this price range), a point of great pride for the company and one of the R 2500 R’s strongest distinguishing factors. (Check out T+A’s summary at https://www.ta-hifi.de/en/audiosystems/r-series/r-2500-r-multi-source-receiver/, and you can find other, more technical, discussions online.) Even Tom noted the receiver’s “dead silent” output – no detectable switching noise – apparently due to the amp’s “intelligent” filtering and sinusoidal switching cycle.

vi) “140 wpc ... .is acceptable but underwhelming”?? “At this price point it should have an SACD player”?? No, no, I’m at a loss for words. Why in the world are these people piling on, and with such silly statements? Is someone at T+A running for President?

vii) “Caveat emptor – consider the warranty”?? Again, a terribly misleading comment posted by someone who apparently doesn’t know what they don’t know. Here’s my first-hand experience with T+A’s terrific support: My early production unit had a minor hardware problem (a circuit-board’s infant-mortality failure compromised two of its HDMI inputs. When I reported the problem through my dealer, the CEO himself emailed me, and kept in contact throughout, to make sure I was being taken care of. Despite my having been tardy in registering the unit, the company honored the warranty without question, quickly diagnosing this elusive issue, promptly drop-shipping from Germany a new board, cables, a torx screwdriver and spare anodized chassis screws, and even a spare remote (all just to be sure that the problem was with the board itself), and closely monitored my self-repair effort. When I opened up my unit, I found its internal layout seemingly designed to facilitate maintenance -- the entire repair required less time than it took to disconnect the unit from my rack. I’ve been told that T+A is quite liberal in its service policies, so any “limitations” on the warranty don’t concern me (again, my late registration did not affect my coverage). Best of all, the reps I worked with – even the CEO – all seemed genuinely concerned about restoring my unit to full functionality as quickly as possible. These guys were great.

So, speaking as an experienced owner who has extensive experience with high-end audio and a deep technical background, I can’t speak too highly of this component or of the company that produced it. People can whine about “too much global feedback” or even speculate whether T+A’s published specs “are to be believed” (talk about insulting!). But consider this: Those in this thread who speak most highly of T+A components are those who actually owned them.

In my educated opinion, this is a wonderful product, unique in the breadth of its connectivity and functionality, boasting outstanding sound quality and build quality, and incorporating envelope-pushing circuit design – a true audiophile amp/preamp/DAC/streamer/disc-transport/headphone amp/radio/etc./etc. -- and a friggin’ bargain at the price. $19K was almost triple what I’d budgeted for an integrated amp capable of doing dual duty as a mission-critical stereo system and as a high-quality driver for the FL, FR, & LFE speakers of a multichannel setup -- but I haven’t regretted this purchase for an instant.

That’s all I have to say.

DaveinSM's picture

You’re entitled to your opinion, but it certainly isn’t the only educated one here.

And the fact that you own one makes you biased in your opinion.

And just a a gentle correction to your statement about this product being “an audiophile product”. I never stated that it wasn’t an audiophile product. What I said was that it’s not a PURIST audiophile product. Since it’s an integrated amp and not separates, I stand by that statement. That doesn’t mean it sounds or performs poorly.

T+A has separate pre/power amp products in their lineup as well. And they’re not positioned lower in the lineup than the integrateds; their flagship designs are separates.

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