Subwoofers & Crossovers:
Acarian Alon PW1 (Reina,Atkinson) XX-2
Acoustat SPW-1 (Olsher) XII-10
Apogee DAX active crossover (Balgalvis) XIII-8
Apogee Mini-Grand Stereo & DAX crossover (Norton) XVII-3
AR Subwoofer (Olsher) IX-6
Artemis Eos Base Module (Rubinson,Atkinson) XX-10
Athena Technologies P3 (Tellig) XXIII-4
Atlantic Technology 252PBM (Holt,Atkinson) XVIII-4
Audio Concepts Saturn (Olsher) XII-1
Audio Physic Rhea (Fremer) XXI-9
AudioControl Richter Scale III analyzer/equalizer/crossover (Olsher) XII-1
Audiostatic SW-100 (Olsher) XVII-10
B&W PCS8 Cinema THX (Norton) XVII-10
Bag End S18E/ELF 1 (Greenhill) XVIII-5
Bryston 10B active crossover (Stone,Norton) XVII-5
Celestion Soundstyle CSW (English) XVIII-10
Celestion System 6000 (Colloms,Olsher,Greenhill) X-2, XII-1,10
Cogan-Hall ContraBass 12 (Olsher) XII-1
Dayton Wright ICBM-1 (Watkinson) VIII-1
Enigma (Olsher) VIII-8
Ensemble Profundo (Olsher,Atkinson) XV-12
Ensemble Profundo Silver (Colloms) XIX-9
Entec l2-f20 (Norton) XVI-5
Fosgate/Audionics FS-400 THX (Holt,Atkinson) XVII-4
Genesis Technologies Servo 10 (Norton) XIV-10
Gradient SW-57 (Stone,Atkinson) XVII-1
Gradient SW-63 (Greenhill) XIV-10, XVI-3
Hsu Research SW10 (Olsher,Atkinson) XVI-3
Infinity Modulus (Atkinson) XIII-11
KEF AV1 THX (Holt) XIX-1
Kinergetics BSC SW-100 (Olsher) XII-1
Kinergetics SW-800 (English) XV-3, XVI-8
Lantana Laug (Olsher) XII-1
M&K Volksbass (Holt) IV-9
McIntosh HT-2 THX (Norton) XVII-5
Muse Model 18 (Harley,Greenberg,Greenhill,Norton) XIV-7,8,10, XVI-3,5
Nelson-Reed 5-02 (Holt) VIII-3
Nelson-Reed 1204 (Holt) XI-4
Nelson-Reed AC1204 active crossover (Holt) XI-4
NHT SW2 (Greenberg,Atkinson,Harley) XVII-1
NHT MA-1 stereo active crossover/amplifier (Greenberg,Atkinson,Harley) XVII-1
Paradigm Reference Servo-15 (Greenhill) XXII-8
Phase Technology PC-90 (Harley) XIV-9
PSB Alpha SubSonic 5 (Stern) XXIII-6
QLN (Sommerwerck) VIII-3,5
REL Strata II (Harley) XX-8
REL Studio II (Phillips) XXI-7
Revel Ultima Sub-15/LE-1 (Atkinson) XXI-10
Shadow Engineering Limited Edition active crossover (Olsher) XII-1
Shahinian Double Eagle (Holt,Atkinson) XVI-5
Snell EC 200 active crossover (Greenhill) XIX-3
Snell SUB 750 THX (Holt,Atkinson) XV-12, XVII-4
Snell SUB 1800 THX (Norton,Greenhill) XVIII-7, XIX-3
Spica Servo Woofer System (Holt,Archibald,Cordesman) IX-5,7
SR Bolero Forte (Atkinson) XII-4
Sumo Delilah active crossover (Atkinson) XI-4
Sumo Samson (Atkinson,Olsher) XI-4, XII-1
Terpsichore Bifocal (Olsher) XII-1
Threshold PCX active crossover (Olsher) XII-1
Velodyne F-1500 (Greenhill) XVI-3
Velodyne FSR-18 (Greenhill) XXI-8
Velodyne HGS-18 (Greenhill) XXII-10
Velodyne ULD-15 (Greenhill) XII-10
Velodyne ULD-18 (THX) (Greenhill,Norton) XII-10, XIV-10, XVI-3
Vendetta Research TPC-1A active crossover (Olsher) XII-1
VMPS (Olsher) VIII-4