Upgraded Crestron (ATI) 16x60 Amp; Now 11channel: 5x200W@8Ohms + 6x60W@8Ohm
This amplifier was a pet project of mine to provide the ultimate all in one amplifier for my home theater. I am a computer engineer who started out as a technician so I enjoy keeping my technician skills fresh along with my analog engineering skills.
This is now probably the most flexible home theater amplifier around. I haven't found anything commercially available that can match what it can do. It can be configured as:
2 Channels Bridged: 2x200@8ohm, 12x60W
3 Channels Bridged: 3x200@8ohm, 10x60W
4 Channels Bridged: 4x200@8ohm, 8x60W
5 Channels Bridged: 5x200@8ohm, 6x60W
(specs with all channels driven!)
This means that one amplifier can drive 11 channels in a home theater system which is enough to drive all of the base layer and atmos speakers in a 7.x.4 setup.
I started with a very nice used Crestron unit that is in very good cosmetic shape. It has one light scratch on the front which I did a closeup and distant shot of. It really isn't very noticeable but I want to fully disclose that it does have a few skuffs with this one being the only one on the front panel.
It is a modified Crestron 16x60 amplifier that removes the crestron control blocks and changes the main relay to the 12v version of the original. This makes it a 12V triggered home theater amplifier (the 12v trigger or a 12v DC power supply is required, a 12v DC supply is included).
Each of the boards in the 16x60 contain two amplifiers that are identical in design to the crestron 2x60 amplifier except they don't have the bridging circuit. An expansion board was added along with a high quaility audio switch to replicate the bridging functionality of the Crestron CNAMPX-2x60 amplifier. To match my home theater requirements I modified 6 of the boards (one spare) and made 5 of them brdigeable. The remaining 3 boards are unmodified. Bridging can not be used when driving 4 Ohm speakers.
Crestron amplifiers are top quality amplifiers for home automation and are built in the USA by ATI who makes very high end amplifiers with their own branding and also others like Lexicon. All of the amplfier boards even have ATI logos on them.
I tested each channel of this unit after the modifiction comparing it to a 2x60 amplifier to ensure that they work identically.
The unit is VERY heavy weighing an honest 90lbs without packaging. Shipping is unlikely to be cheap so local pickup in the Phoenix area is available. I have shipped heavy units without any issues in the past and will pack the amplifier very carefully using appropraite packaging.
Specs from Crestron:
Note that the 200W at 8 Ohms spec is from the 2x60 amplifier. The only difference is that this is on a single board and it uses a shared larger toroidal transfomer.
Typical of 8 Stereo Room Outputs:
Output Power 20Hz to 20kHz, all outputs driven at rated THD:
60 watts per channel at 8 ohms
90 watts per channel at 4 ohms
220 watts at 8 ohms bridged (channels 1-4 and 13-16 only; requires CNXBRMO, no longer available)
200 watts at 8 ohms bridged (using the modified board and circuit form the CNAMPX-2x60)
Power Bandwidth 3Hz to 50kHz, +0/-3dB
Frequency Response 20Hz to 20kHz, +0/-0.1dB at 1 watt, 8 ohms
Total Harmonic Distortion (THD) ≤0.03% at full power
IHF I.M. Distortion ≤0.01%
SMPTE I.M. Distortion ≤0.03%
Dynamic Headroom ≥2dB
S/N Ratio >110dB A-weighted
Damping Factor >400
Channel Separation >100dB, 20Hz to 20kHz
Main Power 120 Volts AC ±10%, 50-60 Hz, 1800 Watts
Cresnet Power Usage 12 Watts (0.5 Amps @ 24 Volts DC)
Temperature 41° to 104°F (5° to 40°C)
Humidity 10% to 90% RH (non-condensing)
Black metal, 4U 19-inch rack-mountable (rack ears included)
7.69 in (19.53 cm);
7.0 in (17.78 cm) without feet
Width 17.18 in (43.64 cm);
19.0 in (48.26 cm) with rack ears
Depth 17.45 in (44.32 cm)
90.2 lbs (41.0 kg)