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wehat
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Merging new/old components for a new system...

Okay, first, my old stuff...

Denon AVR-800 integrated amp/reciever...

Fisher DS 177 3 ways, not sure on the wattage, maybe rated for 75 back in the day. I imagine they can take a bit more than that as speakers/amplifiers are rated for solid state now...

This setup sounded really good in my old 9'x9' room, but now I'm in a much bigger space and while looking for some options I came across these in my dad's collection that were sitting on a shelf...

GAS "Thalia" preamp with incredibly dirty pots and an Acurus "A150" amplifier. On top there is a dbx "110" subharmonic synth which I'm guessing bumps up the bass a bit and a Bedini "Spacial System" of which I have absolutely no idea the purpose.

Bose 201s which on the back say they are "compatible with 120w/channel amplifiers" and later that they are rated at 60w. Woofer isn't damaged, just dusty .
(Also, my dog that jumped into every photo I took, I cropped him out of the others but felt he should have one moment to shine.)

My main concern is that I don't want to break anything, for testing purposes I have also acquired these POS white van speakers that sound absolutely terrible

I'm really curious what you all think I should set it up like. I was thinking I'd run the two bose speakers off of my Denon and use the outs on that to signal the amp which would run the Fishers (Can I even do that using the outs on the Denon?)

Finally, I'm not sure what kind of magnetic shielding amps use (if any) and how dangerous having it near my computer would be (in the first photo you can see the top of my computer case).

Thanks for you input!

Jan Vigne
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Re: Merging new/old components for a new system...

What "outs"?

wehat
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Re: Merging new/old components for a new system...


Quote:
What "outs"?

It has got a set of Left and Right RCA outputs on the back I/O that I assume are the correct ones for providing a signal to an additional amp.

Jan Vigne
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Re: Merging new/old components for a new system...

What are they labelled? Pre out or tape out?

wehat
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Re: Merging new/old components for a new system...

One set labeled DAT/tape, and another labeled VCR (It is an A/V reciever). I'm guessing that I need a pre-out, not either of these.

Also, someone is selling "JVC 5341" 4 ways on my local Craigslist for $30. I emailed him and he said he does not have a stereo to test them out on, would it be rude for me to bring my own? ha.

Anyways, I think I'm going to see how my Fisher speakers sound on that amp, is there any danger of me damaging them because the amp is probably putting out 150w per channel compared to the speakers rated 75w? (My google-fu is stong and I was able to find the factory specs)...

Thanks-

Jan Vigne
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Re: Merging new/old components for a new system...

You need a pre out. You can damage the speakers with your amp but only by being foolish.

wehat
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Re: Merging new/old components for a new system...

So, what about those JVCs? Also, is there any danger keeping it near my precious hard disks?

(unapologetic bump)

wehat
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Re: Merging new/old components for a new system...

So, as I understand it, pre-outs are not amplified yet output is controlled by the volume knob, whereas tape-out/record-out is just the raw unamplified output from the receiver. Correct?

Also, does anyone know what those two extra components (on top of the rack in my photo there) do?

Jan Vigne
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Re: Merging new/old components for a new system...

Pre amplifier outputs are taken after the volume control and represent the signal being fed to the power amplifier - unless a signal processing unit such as an EQ is inserted between the two components.

Tape out is a (typically) buffered output that represents the raw signal from a selected source, CD, phono, tuner, etc. It can also be used as a signal processing loop for items such as EQ, DBX, etc. The tape output is taken before the volume control and is unaffected by the level at which you listen.

Additionally, the output impedance of pre out and tape out are very likely different as they are intended to see different loads downstream.

It's your call on the JVC speakers.

Jan Vigne
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Re: Merging new/old components for a new system...

If I remember correctly, the DBX is meant to extend the low frequency response of your speakers. It is rather ineffective if the speakers do not have reasonably deep extension in the first place and it's overuse can tax the system for no really good reason. Since its effective range is in the deepest bass regions, it is quite often very dificult to actually hear what the DBX is adding. You will not likely hear an improvement when using this with the Bose or JVC's, etc. This piece is probably listed in the DBX pages.

The other piece is probably meant to add dimensionality to the sound much as Dolby Pro Logic achieves. The unit you have might be meant for two or four speakers as this was the way to manage ambience retrieval until Dolby Pro Logic entered the consumer market.

mchale
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Re: Merging new/old components for a new system...

I think the your best bet is to forget about the subharmonic synth and Spacial System, they're just going to add unnecessary stops on your signal path (bad news bears). Run the bose bookshelves off of the Denon, run the record outs into the GAS "Thalia" preamp, to the Acurus "A150" amplifier to run your fisher speakers that way you have control over volume in both places. Of course before you do all this clean the pots on your preamp. If I were you (which in not) I would avoid those JVC speakers and save your money for a... more modern upgrade. Hope this helps, feel free to message me if you have any more questions.

wehat
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Re: Merging new/old components for a new system...

Thank you Jan and mchale, I ended up running the Fishers off of the GAS/Acurus using the front speaker output from my computer, and the Bose off of the Denon using the rear speaker outputs, sounds great (Or would rather, If I had someplace sensible to put them :/)

The other two components I just left out in the end, I didn't like the effect they had on everything at higher volumes (which is where I usually listen at).

Thank you for all your help, I'll probably be deleting my photos to save bandwidth

As far as new speakers go, I'm working on getting an old marantz model 9 tube amp and some klipsch cornwalls to play my vinyl

(edit: hah, we must be on the same wavelength mchale, I set it up exactly like that without seeing your post)

mchale
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Re: Merging new/old components for a new system...


Quote:

As far as new speakers go, I'm working on getting an old marantz model 9 tube amp and some klipsch cornwalls to play my vinyl

(edit: hah, we must be on the same wavelength mchale, I set it up exactly like that without seeing your post)

Good work You might consider using the Marantz & Klipsch combo as your main system.

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