| Audio Amplifiers |
Alpha 7R |
Alpha 8R |
Alpha 9 |
| Continuous Power Output, per channel |
| Both channels, 8ohms, 20Hz-20kHz |
40W |
50W |
70W |
| Single channel, 8ohms, 1kHz |
50W |
60W |
85W |
| Single channel, 4ohms, 1kHz |
80W |
100W |
140W |
| Peak current rating |
+/-12A |
+/-12A |
+/-18A |
| Distortion, 8ohms, 80% rated power, 1kHz |
0.01% |
0.01% |
0.02% |
| |
| Phono Cartridge Input |
|
|
MM* MC* |
| Frequency response ref. IEC RIAA |
+/-1dB |
+/-1dB |
+/-0.5dB +/-0.5dB |
| Noise (CCIR) ref. rated output |
76dB |
77dB |
79dB 73dB |
| Input sensitivity |
2.7mV |
3.0mV |
2.6mV 260uV |
| Input impedance |
47 Ohms |
47 Ohms |
4 Ohms 300 Ohms |
| Overload margin |
30dB |
30dB |
35dB 35dB |
| *when optional Alpha 9/Delta 290 phono module fitted |
| Line and Tape Inputs |
| Frequency response +/-0.5dB |
20hz-20kHz |
20Hz-20kHz |
20Hz-20kHz |
| Noise (CCIR) ref: rated output |
-95dB |
-96dB |
-98dB |
| Input sensitivity |
250mV |
275mV |
160mV |
| Input impedance |
25k Ohms |
15k Ohms |
5k Ohms |
| Tone controls at 50Hz, 10kHz |
+/-8dB |
+/-8dB |
+/-8dB |
| Preamplifier Outputs |
| Nominal output level |
480mV |
540mV |
650mV |
| Maximum output level |
3.5V |
3.5V |
8V |
| Output impedance |
100 Ohms |
100 Ohms |
100 Ohms |
| General |
| Power consumption (maximum) |
320VA |
400VA |
550VA |
| Size W/D/H mm. |
430x330x85 |
430x330x85 |
430x330x95 |
| Weight, nett. |
4.4kg |
4.5kg |
6.1kg |
| Remote control supplied |
n/a |
No |
Yes (CR35) |
 |
| Audio Amplifiers |
Alpha 10 and Alpha 10P |
| Power output @ <0.5% THD |
2 x 108W into 8R, 2 x 173W into 4R
or 3 x 101W into 8Ohms
(3rd channel fitted to Alpha 10P). |
| Mains voltage |
115V or 230V a.c. -15%, +15% @48 to 62Hz |
| VA Rating |
800VA Max |
| Standby |
8VA max when power off or in standby |
| Power output @ <0.5% THD |
2 x 108W into 8R, 2 x 173W into 4R
or 3 x 101W into 8Ohms
(3rd channel fitted to Alpha 10P). |
| Sensitivity |
740mV +/- 0.2dB for 100W r.m.s. into 8 Ohms normal gain,
975mV +/- 0.2dB for 100W r.m.s. into 8 Ohms low gain. |
| Frequency response |
10Hz to 20KHz +0,-0.3dB. |
| THD |
<0.007% @ 1KHz, 100W into 8 Ohms output,
<0.05% @ 10KHz, 100W into 8 Ohms output. |
| Signal to Noise |
Better than 90dB CCIR ref 1KHz 0dBV |
| Crosstalk L/R |
Better than -80dB at 1KHz ref 108W into 8 Ohms,
Better than -60dB at 20KHz Ohmsef 108W into 8 Ohms.
|
| Output offset |
<10mV d.c. when stabilized,
<400mV d.c. in first 40 seconds after switch-on. |
| Peak current |
+/- >25A, +/- >10A after 10ms |
| Slew rate |
+/- >100V/us internal, +/- >70V/us with input low-pass filter |
| Damping Factor |
>300 @ 100Hz, >200 @ 1KHz, >100 @ 10KHz, >50 @ 20KHz.
All with 8Ohm load. |
| Headphone Output Alpha 10 Only |
Suitable for 8 Ohms to 2K Ohms,
Max voltage: 8V r.m.s. into 2K Ohms,
Max current: 105mA r.m.s. into 8 Ohms,
Max output power: 220mW r.m.s. into 75 Ohms. |
| Pre-amp output |
Standard on Alpha 10 Integrated Amplifier. |
| Remote bus input |
Compatible with Xantech system. Interprets RC5 codes with carrier
and static d.c. remote power switching. Load is LED in series with
220Ohms to be driven through a 13mA current source. |
| Remote bus output |
Reflects remote bus input to drive one or two series LEDs at 5mA to
25mA peak. |
| Thermal Cut-out: |
Threshold level is 13W r.m.s. into 8Ohms,
both channels, for 45
minutes at 22 degrees centigrade ambient. Higher power and longer
time will activate cut-out. |
