Roland Boss GT-10 (Years Unknown)
Documentation on the Boss GT-10 is thin, and that comes first. What is known is that it was a guitar effects processor, a floor-based multi-effects unit, and that Boss positioned it as the flagship of its multi-effects line at the time of release. The GT-10 was built around Boss's custom DSP and its proprietary COSM sound-modeling engine. Boss's own materials claimed a marked improvement in sound quality over previous generations of the line. Related models in the same family include the GT-100, GT-001, and GT-3, though the exact lineage and release chronology are not documented here.
The GT-10 is 24-bit end to end, with 24-bit A/D and D/A conversion and a 44.1 kHz sampling rate. Boss used its "AF" (Adaptive Focus) method on the converters. It's a proprietary Roland/Boss technique that the manual says improves the signal-to-noise ratio of the conversion stage. The unit carries 400 program memories: 200 user and 200 preset. It's a big floorboard, 542 mm wide, 272 mm deep, and 77 mm tall (104 mm at maximum height), and it weighs 4.9 kg. It runs on a 9V DC supply, the Roland PSB-1U adaptor, and draws 800 mA.
I/O is generous for a floor unit of this type. There is a 1/4-inch instrument input at 1 M ohm, stereo outputs (L/MONO and R) on 1/4-inch jacks, a stereo phones jack, an external effects loop (SEND and RETURN on 1/4-inch), an amp control jack, an expression pedal/control jack, MIDI IN and OUT, a coaxial digital output conforming to IEC60958, and a USB connector. The display is a 132 x 64 dot backlit graphic LCD with a small 7-segment, 3-character LED beside it. Dynamic range is rated at 100 dB or greater (IHF-A).
Owners are mixed on it. One long-time user on Ultimate-Guitar rated reliability and durability an 8 and called the GT series "always reliable and road worthy." The same user rated the sound a 6, described it as "muddy" when trying to cut through a live mix, and preferred the editing workflow on a Vox ToneLab SE. A commonly reported long-term fault is that the pots loosen with age and can cause patches to falter. A factory reset procedure exists for restoring factory settings, and the service documentation includes a full exploded view and parts list.
Production years and original retail price are not documented in the sources available here. A used example has been listed in Moscow in ideal condition with its original Roland power supply, USB cable, and manual. One owner reported paying A$500 for a used unit.
- Product type: guitar effects processor / multi-effects floor unit
- Conversion: 24-bit A/D and D/A, 44.1 kHz sampling, AF method
- Program memories: 400 (200 user + 200 preset)
- Input: 1/4-inch, 1 M ohm, -10 dBu nominal
- Outputs: L/MONO and R 1/4-inch, -10/+4 dBu switchable; stereo phones
- Digital out: coaxial, IEC60958
- MIDI: IN, OUT; USB connector
- Display: 132 x 64 dot backlit graphic LCD plus 3-character LED
- Dynamic range: 100 dB or greater (IHF-A)
- Power: 9V DC, Roland PSB-1U adaptor, 800 mA
- Dimensions: 542 x 272 x 77 mm (104 mm max height)
- Weight: 4.9 kg
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