High-end High Power Class D Amplifier
This High-end High power class D amplifier is able to deliver 2 x 250 W rms into 4 Ohms speakers in stereo configuration or a solid 500 W rms into a 8 Ohms speaker in bridged configuration, with less than 0.5% THD+N at full power.
2 XLR balanced inputs,
Safety switch for changing from stereo to bridged mono operation,
High grade ALPS Blue Velvet volume control.
19″ 2U rackable.
Technical specifications
| Characteristic | Value |
| Max. nominal RMS power at 4 ohm (defined at 1% THD, 1KHz) | 250W |
| Max. nominal RMS power at 8 ohm (defined at 1% THD, 1KHz) | 130W |
| Max. bridgeable power | 500W RMS / 8 Ohm |
| Bandwidth (-1dB, 4 ohm load) | 17Hz – 20 KHz |
| Bandwidth (-3dB, 4 ohm load) | 6Hz – 30 KHz |
| Bridgeable | Yes |
| Distortion (1KHz, 1W, 4ohm load) | 0.015 % |
| Noise level, unweighted | 200 µVrms |
| Signal/Noise ratio | >106dB (input shorted, refered to full power) |
| THD + N at full power | <0.5% (sine 1KHz) |
| Modulation type | PWM synchronous natural sampling |
| Number of channels | 2 |
| Continuous peak current before limiting | 17A |
| Efficiency | >95 % |
| Gain | 40dB in balanced inputs (34dB when used asymetricaly) |
| Minimun Admissible Load impedance | 0.5 ohm |
| Input impedance | 10 KOhm, balanced |
| Output ripple (input shorted to GND) | 600mV RMS |
| Switching Frequency | 360 kHz |
| PROTECT mode activated output voltage | 6 V |
| Chassis | 19″ 2U rackable |
| Weight | 5.5kg |
| Main supply voltage | 110V – 220V 50/60 Hz |
| Overcurrent Protection | Yes |
| Overvoltage protection | Yes |
| Undervoltage protection | Yes |
| Load short-circuit proof | Yes |
| Temperature controled fan | Yes |
| Temperature protection | Yes |
| CLIP detector/indicator | signalling LED |
| PROTECT | signalling LED |
| Temperature sensor | signalling LED |
Options
| Characteristic | Option | Option #) |
| Output connectors | Heavy binding posts, gold plated. Neutrik speaker connector |
A0 A1 |
| Output connectors placement | Front panel. Rear panel. |
B0 B1 |
| Volume control | without with |
C0 C1 |
| Input connectors | RCA XLR |
D0 D1 |
| Input connectors placement | Front panel. Rear panel. |
E0 E1 |
| Chassis 19″ 2U handles | without with |
F0 F1 |
| Main supply inlet and voltage selector location | Front panel. Rear panel. |
G0 G1 |
| Temperature controled fan location | Front panel. Rear panel. |
H0 H1 |
| PROTECT signaling relay (cold contacts NO & NC) | with without |
J0 J1 |
| PROTECT relay connector location (mating female connector included) | Front panel. Rear panel. |
K0 K1 |
| Stereo/Mono bridged safety switch location | Front panel. Rear panel. |
L0 L1 |
For example, if you want a quote for a Sandstone Amp without handles, without volume control and no PROTECT signaling relay, with XLR input connectors,Neutrik output connectors and the Stereo/mono switch on the front panel and the mains inlet and fan on the rear panel, you should ask for options A1 B0 C0 D1 E0 F0 G1 H1 J0 L0.