CROWN D-150A SERIES II STEREO AMP AMPLIFIER

Description: The Crown D-150A Series II is an extremely high quality professional stereophonic power amplifier. It's rated at 80 watts per channel (WPC), and like all American amplifiers, puts out much more than that. This amplifier sold for the equivalent $1,500 when new; this is a first-class professional product built to last a lifetime.The Crown D-150A Series II is the grandson of the 75 WPC Crown D 150 of 1971, which was rated at 75 watts per channel. 75 times two equals 150, its model number. It was introduced as a sane version of the beastly DC-300, but still with more than enough power for home Hi-Fi and studio monitoring use at an even more reasonable price, still with all the performance of the DC-300. This is a bulletproof amplifier built to tough commercial, not consumer, standards. It has solid metal knobs, glass-epoxy circuit boards and a three-year no-fault warranty — with Crown paying the shipping if it fails. Crown proclaims in the manual that it "should provide you with a lifetime of trouble-free service." I haven't tried, but I certainly believe it would take quite a few rounds from a 22-calibre rifle before it had any problems. 8 Ω Stereo80 watts (19.03 dBW) minimum per channel from 1 ~ 20,000 Hz at 0.05% THD or less.95 WPC (19.78 dBW) on the back of the performance sheet or 90 WPC (19.54 dBW) in Crown's manual at 1 kHz at 0.1% THD. You'll see also that Crown elsewhere refers to rated power as 75 WPC (18.75 dBW), especially where it refers to sensitivity. 4 Ω Stereo125 watts (20.97 dBW) minimum from 1 ~ 20,000 Hz at 0.05% THD.145 to 155 WPC (21.61 ~ 21.90 dBW) at 1 kHz at 0.1% THD. 8 Ω Mono315 watts (24.98 dBW) at 1 kHz at 0.1% THD. 16 Ω Mono160 watts (22.04 dBW) minimum from 1 ~ 20,000 Hz at 0.05% THD.180 watts at 1 kHz at 0.1% THD. Output Loads 4Ω, 8Ω and 16Ω.Safe with any load, including shorts — open circuits and reactive loads — although it will kick-in its protection circuitry with 2Ω loads. TopologyIt has a standard unregulated linear power supply with ±45V DC rails and dual 9,400 uF 50V capacitors, and an extra low-current 55V rail to help in biasing.Class A + AB.The drivers operate in class A at low levels. The output transistors don't turn on until the output demand it, at which point they are class B. The drivers handle all the zero-crossings.Like almost all Crown linear amplifiers, it's based on the 1968 patent for the DC-300, and you'll see "patent number 3,493,879" on the back.There's an operational amplifier at the front end, and the IOCs light if the error output of this operational amplifier exceeds a certain value. Input Two mono ¼" unbalanced phone jacks, 25 kΩ ± 30%.The inputs feed 25 kΩ potentiometers directly, whose outputs feeds the amplifier. Input Sensitivity1.19 V ± 2% for rated power into 8Ω.Sad part is Crown never really comes out and tells us the rated power for this D-150A Series II version.Since its gain is 20.6x (26.28 dB), 1.19 V in gives us 24.514 V out, or 75 watts for rated power.There's an internal jumper to increase the gain to 0.775 V sensitivity. Frequency ResponseDC ~ 20,000 Hz ± 0.1 dB at 1 watt. DC ~ 100,000 Hz ± 1 dB at 1 watt. Phase ResponseDC ~ 15,000 Hz, +0º -15º at 1 watt. Signal to Noise Ratio110 dB below "rated power" into 8Ω, 20-20,000 Hz measurement bandwidth.If you take rated power as 75 W (18.75 dBW), this means -91.25 dBW or 750 pW or 77.46 µV or -82.22 dBV of noise.If you take rated power as 80 W (19.03 dBW), this means -90.97 dBW or 800 pW or 80 µV or -81.94 dBV of noise. THD< 0.001% from 20 ~ 400 Hz, increasing linearly to 0.05% at 20,000 Hz at 80 W. IMD< 0.05% from 10 to 250 mW.<0.01% from 250 mW to 80 W. Slew Rate6 V/µS. Damping Factor & Output Impedance> 400 damping factor into 8 Ω from DC to 400 Hz.< 15 mΩ in series with < 3 µH output source impedance. Output Connectors Lab standard 3/4" spaced 5-way binding posts.Designed for standard MDP lab connectors. QualityMade in Elkhart, Indiana, USA. Power Input120 VAC ± 10%, 50 ~ 400 Hz.Internal taps also for 100 V, 200, 220 and 240 V (all ± 10%).Red LED power light, although it looks amber when off.3-wire 5-foot captive cord. Rated Power ConsumptionLess than 40 W at idle, 750 W max.MDX 6.25A rear-panel fuse.See also Actual Power Consumption. Size3 RU, 8" deep measured.5.25 x 19 x 8.75" HWD, depth is behind mounting flange.133 x 483 x 222 millimeters HWD, depth is behind mounting flange. Weight24 lbs. (10.9 kg). ExportCrown labeled their export models as Amcron, not Crown. Price, USAMay 2023About $150 used if you know How to Win at eBay.The original walnut veneer cabinet by Jeln is uncommon and sells for sells for about $600 used if you can find one. June 2015about $150 used if you know How to Win at eBay. The really nice one shown here, complete with original box and lab reports, cost me just $250 delivered in June 2015. Most you'll see at around $150 have been used professionally and are pretty beaten up; no worries, they're built for that.The original walnut veneer cabinet by Jeln is uncommon and sold for about $160 used if you can find one. 1991 (D150AII): $1,400, corrected for inflation in 2015 ($795 list price at the time).1990 (D150AII): $1,400, corrected for inflation ($795 list price at the time).1989 (D150A2): $1,500, corrected for inflation in 2015 ($795 list price at the time).1988 (D150A2): $1,500, corrected for inflation in 2015 ($749 list price at the time).1987 (D150A2): $1,550, corrected for inflation in 2015 ($749 list price at the time).1986 (D150A2): $1,500, corrected for inflation in 2015 ($699 list price at the time).

Price: 145 USD

Location: Seaside, California

End Time: 2024-09-02T19:11:44.000Z

Shipping Cost: N/A USD