Jeff Rowland Model 1
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| Condition | |
| Payment methods |     |
| Ships from | Crestone, CO, 81131 |
| Ships to | United States |
| Package dimensions | 18.0" × 18.0" × 8.0" (60.0 lbs.) |
| Shipping carrier | UPS |
| Shipping cost | $100.00 |
 Average | Research Pricing |
I bought this amp in 2008 and it sat unused for 6 of the past 9 years. 100% functional and in aesthetically great shape. This particular Model 1 (S/N 1050) does NOT have the bridging switch to use it as a monoblock. I love this amp so much that I bought 2 more used ones (with bridging switches) brought them to Jeff Rowland who went through them and performed an upgrade to them ($450 each) for me. I am now enjoying this pair of Model 1's. But... this (my original) Model 1 certainly performs very well on its own as a stereo amp. I live in Colorado a few hours from where Jeff Rowland Design is located. If a buyer wanted to have this amp upgraded I would consider doing that for the $450 that Jeff charges plus $100 for my travel time.
Jeff Rowland Design Group Model 1 power
amplifier Specifications
Description:
Solid-state stereo
power amplifier. Power output: 60Wpc into 8 ohms (17.8dBW), 120Wpc into 4 ohms
(17.8dBW), 215Wpc into 2 ohms (17.3dBW). Bridged power output: 240Wpc into 8
ohms (23.8dBW), 360Wpc into 4 ohms (22.6dBW), 500Wpc into 2 ohms (21.0dBW).
Power bandwidth: 0.3Hz to 300kHz, –3dB. Slew rate: 70V/ns. THD+noise: under
0.035% at 1kHz, rated power into 8 ohms. Damping factor: greater than 200,
20Hz–20kHz into 8 ohms. Output current: 22A peak, continuous, 55A peak into 0.1
ohm for 20ms at 1kHz. Input impedance: 100k ohms, 20k ohms, or 600 ohms (user
selectable). Input sensitivity: 136mV for 1W into 8 ohms. (Voltage gain: dealer
adjustable, 26dB standard.) Common mode rejection ratio: greater than 90dB.
Power dissipation: 175W (idle).
Dimensions: 15" W by 5.75" H by 15" D. Weight: 48 lbs.
Price
(new): $3100 (1991); no
longer available (2016). Approximate number of dealers: 30.
Manufacturer:
Jeff Rowland Design
Group, Inc., 2911 N. Prospect Street, Colorado Springs, CO 80907. Tel: (719)
473-1181. Fax: (719) 633-4158. Web: www.jeffrowland.com.
Read more at
https://www.stereophile.com/content/jeff-rowland-design-group-model-1-power-amplifier-specifications#MktJ9kA7c2urKK9Y.99
Stereophile Review
Here: https://www.stereophile.com/content/jeff-rowland-design-group-model-1-power-amplifier
Questions for the seller |
|---|
| Hi, What does the Rowland $450 upgrade consist of?
Thanks, Cort Hi Cort,
Sorry for my delayed (and ultimately lame?) response ;-)
It may consist of Jeff Rowland waiving his magic audio wand over them! Honestly? I forgot the precise explanation that Jeff himself gave to me, I'll [filtered] him and see if I can get my memory refreshed as to exactly what he replaces. The invoice for the work I had done on my 2 new amps simply reads "Updated both units to Series II" and "retested and meets S2 specs"
It's a longish audio story but basically I was pleasantly surprised to find that Jeff Rowland himself does repairs of his old amps. Whe I met him in person with 2 questionable Model 1's that I took a chance on buying through e-bay he tested them on teh spot, said there was nothing seriosuyly wrong (a blown fuse, a loose solder connection) and then asked me if I might want to do this "series 2" upgrade to which I pause d moment and said "sure, why not". If Jeff Rowland thought it made a significant difference I thought it would be a good investment.
I did not do an objective "A B" test when I swapped out my original Model 1 that is now for sale here with my 2 new ones that I am now enjoying. I went for one Model 1 running 2 channels to 2 upgraded Model 1's monoblocked which... are sounding FANTASTIC to my ears!
So... I'll see if I can get a response from Jeff as to the details of what a "series II" upgrade consists of. |
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