Modified with transformer, Automatic EQ compressor. This design allows deep bass and impulse response to be enhanced and less high frequency attenuation and clarity enhancement circuit. Unit has a ground modification and capacitor update for 6db noise floor improvement. This version has a 4560 op amp upgrade for line out balanced out. Mic pre amp RFI suppression capacitor. Modified with first stage tube harmonic bias control (right control) Cleaned switch with silver paste. #9 condition
4-space rack design Stereo power amp, full TUBE design, Audio Pro modified. Designed by Marshall the Guitar amp co. Dual EL 34, converted to home audio quality hifi amp. Ruggedized, fresh tubes, call for details.
Heavily modified by Vince. 7 new switches, overdrive control, combo mic pre/comp/eq with many added features. Low noise high gain tube modification. 2 Band Bass/Treble. Front panel paid gain/phase switch. Tape saturation control. Smooth fast compression switch. High gain / bright switch. Power supply ground mod. Transformer EQ optical mod. This is the cats meow! Call for details 617-926-8020. Top flight cosmetic condition #8 with just a tiny bit of rack rash. Some additional information customers have asked about: This unit is 90% all tube, the op amps are for RMS, DC control, balanced out not audio! What I do is make the circuits have more head room less noise better tube character and more correct RMS detector tracking. As you may have noticed the output circuit clips badly and is nowhere close to semi-pro level. It's a wrongly done balanced line op amp stage. Also the compressor threshold and ratio controls are too sensitive, as such the unit can go into a strange and not very likable distortion if pushed. There is some good basic design circuits in this, but just not enough. My mods are not about installing fancy parts it's about improved circuit performance
Cassette/CD player. Rack mount. Top of the line unit. Auto reverse. Balanced line and RCA inputs and outputs. CD + Tape have pitch controls. Tested and calibrated OK. New. 10/10 condition.
We have been selling and repairing professional and consumer audio equipment for over 40 years. (Read some of our customers testimonials here) We keep our database up to date with over 10,000 items in stock. If you see a part number and a price, we have that item in stock. Customers outside of the US, please note that international shipping can be costly (US Post $24 minimum - up to 8oz or 226g). We are glad to combine orders to reduce shipping costs. Take a look at our shipping policies for more information and estimates of prices and shipping time.
Art Pro Channel
# 54689
Modified vactrol variable transformer dynamic EQ, and variable tube bias mod. Professional tube microphone pre-amplifier. Tube/optical compressor. +48V phantom power supply. With true "tube gain cell" compressor. B stock. See more details about the mod here, https://www. Audioproz. Com/AP. Php?Article=19&Tab=Modifications
Studio tube compressor/limiter preamp. AudioPro modifications to optimize tube gain and noise, power supply updates, phase switch pad and hi gain switch added on front panel. Excellent #9 condition.
For sale Audio Pro Rev. 4/5 Modified passive version. New. 2 way passive monitor speaker (pair). Audio Pro modified. Rev 4 Design. Custom cabinet damping. Model 2031A are amplified speakers. I suggested 2031 passive design, and to use any good 40-100 Watt amplifier. Check out the Behringer website for a picture. A modified set is $448. We modify the 2031 to be a near field monitor where midrange tone is "warmer" or slightly receded image by a 3db through about at octave between 800 - 2000 H3. A far field monitor version is slightly brighter or stronger midrange and designed to listen at 4 to 8 feet distance. Basically flat response is perceived at that range. Near field version is for 2 to 5 feet away listening, and indeed most BSEE acousticians agree that a near field should be dipped in midrange. In both cases, the modification consists of improved multi section crossover (it presently has a very simple 4-part crossover) as well. We install a dampening blanket between the internal chambers, dampen tune one of the port slots and finally apply soft felt clone dampeners to improve midrange level and tonal match to crossover. The cabinet is now tuned to reproduce 40 Hz powerful and clean. The speakers are very heavy design with cast frame woofer, using high density MDF cabinet, very well done. No grill cloth is included by design. Shipping can be $38 or so to get them to you.
One of the best passive radiator designs, mods for improved power and midrange, pro use, e way passive radiator design, big bass sound, dark walnut look cabinet, medium brown grills, very minor fabric pulls at corner, minor stain can be painted with box, nice condition, rebuilt original parts, minor cabinet chip in back, original boxes available to ship, Audio Pro modified Rev. 4 x-over, monitors for midfield, #8+
33, 45, 78 speed, pitch adjust, cueing, antiskate. With AT13a cartridge/stylus used but #8 condition. With original RCA cables, good quality. Nice condition, platter looks great, some minor wear, marks on wooden case. Dust cover in fair condition, missing approximate 2" piece broken off at lower back, another 2" crack in back has been taped. Overall condition #9. Call Vinc
Auto correlator noise reduction system with Rev 6 modifications, low noise TLO75 IC update, some capacitor update. Dynamic range recovery system. Wood case, vintage knobs. Low frequency calibration. 9/10 excellent condition.
Arm lift mechanics issues. Added small bracket next to lift control, bracket holds switch in down position to allow play, slide bracket off of switch to allow arm to lift. Belt drive, 33/45 pitch control, dust cover has crack left hinge, new belt installed, new phono cart at 92 with 311 stylus installed, (dent on center silver platter disk) basic service and maintenance, arm balanced, #8-
5 Small 2 way speakers. 6 inches wide, 9 inches tall, 6. 5 inches deep. Black textured vinyl cabinet (no grills by design). 1 inch mylar dome. 4 inch cone/foam surround. Shielded, clear voice and mid bass. Designed as front left and right, and rear left, right and center channel expansion speakers. (Could be modified for improved fidelity). Powered subwoofer. 8 inch front face design. Black with black knit grill. Discreet 1/4 inch input only. Master volume for satellite speakers, separate bass level control. Basic clamp speaker outputs. Includes some speaker cable.
Noise reduction module, 8 channel in/out, individual channel encode/decode. SN #21058. *Needs relay cleaning upon sale. Unit mint in original box, box is damaged/torn but repairable. #9 condition
Local customers, please do not come to the shop without calling ahead first - (617) 926-8020 - for an appointment, so that we can more efficiently help you with your equipment or sound recording needs. We keep our database up to date with over 10,000 items in stock.
If you see a part number and a price, we have that item in stock.
Customers outside of the U.S., please note that international shipping can be costly (US Post $24 minimum - up to 8oz or 226g). We are glad to combine orders to reduce shipping costs. Take a look at our shipping policies for more information and estimates of prices and shipping time.
JBL 2600
# 58298
Audio Pro in house total upgrade of woofer and tweeter. Tonegen Woofer tunes to 40 Hz, Silver Flute tweeter. Rev 3 Phase corrected crossover, Light Oak nice round cabinets. Grills have small pull holes. #8+
Rackmount Wireless Diversity System. Belt pack frequency 13C (211 MHz). With 1/4" connection for guitar. Also includes AT-830cx Lavalier mic. Like new, #9 condition. ** Special Sale! **
PL-2. 2 Level adjuster. Output monitor jack. RCA input. Face plate is good condition but rack handels have obvious scratches. Complete service. Unit in low, 8 condition.
With 16ohm Clestion Vintage 30 speaker, impedance speaker matching switch gives different tone qualities. Spring reverb. 4 6V6 Amplifier, excellent, 4 new Sovtek 6V6 tubes installed, 2 channel IN, multiband EQ, FX send loop, footswitch. 8/10 condition cleaned, calibrated, major super-ruggedization, doubled upon grounds, tested reverb/speaker. New fuse holder.
Limiter, Ducker 2 channel, true balanced IC socketed op amp design. Uses Valley People VCA modules. Calibrated. Low use unit from Shop owners studio, No Rack Rash. #9 condition
Full automatic turntable. Nice walnut base (little chip on rear corner). 16/33/45/78 speeds. Pickering XV-15 Cartridge (available with 78 stylus). Fully serviced - Cleaned and oiled motor, rejuvenated idler wheel, adjusted pulley, + Headshell. Dust cover is in good condition - fine scratches, no cracks. Used good #8+ condition. Note: Slightly prejudice on 33 groove lead in, Set up for use of 78's
Modified mic with CAD 411 whole assembly retro fit into PL20 chassis hypercardioid triple non foam windscreen uses internal ev transformer sounds like RE 20 but can take more sound pressure more clarity. Mic is heavier has less microphonics slightly heavier output. Call for modification. I've done this mod for some fancy studios who like it. Very cool modern mic. 8+ condition.
& matched sub woofer cabinet. Two way satellites have 3" woofers, 3/4" soft dome tweeters, All High quality drivers !!! Burled Maple (orange) look cabinet, dark grey knit grills. Audio Pro Modified for use as satellite speakers with sub woofer # 62039 Cambridge Soundworks Ensemble II sub woofer passive, dual 6" drivers (professionally refoamed), Audio Pro modified x-over rev 4 added dual low filter upgrade and improved cabinet damping/felt on wall fiberglass, mass damped woofer cone, left and right banana post inputs, really excellent compact dual sub, 14"h x 8"w x 16"d, #8 + condition (really nice little combo system-Vince special )
(pair) Truesonic 10" 2 way powered PA speakers. (2) XLR/ 1/4" combo input connector, contour switch, and ground lift switch. Tightened connection and resoldered amp board where suspected. #9 condition, heat ran, serviced, and test played
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Fostex VM200
# 61049
Digital mixer, 8 ch, 4 mic (48V) and 4. 25" TRS, 8 ch ADAT in (optical), MIDI controllable, 2x FX proc internal, moving faders *with manual but no original box or packing*, low use, #9+
3 rack space 8 band EQ. Has quality DB faders, tuning controls for every 150Hz of standard 20 to 20K spectrum, range switches, and Hz filtering for high and low power ins and outs. Very minor wear, overall good cosmetics. #8 condition
