{"id":9313,"date":"2010-04-04T17:26:09","date_gmt":"2010-04-04T15:26:09","guid":{"rendered":"http:\/\/www.hifi-advice.com\/blog\/?page_id=9313"},"modified":"2018-02-03T13:46:16","modified_gmt":"2018-02-03T11:46:16","slug":"jrdg-company-special-model-501","status":"publish","type":"page","link":"https:\/\/www.hifi-advice.com\/blog\/jeff-rowland-power-amplifiers\/jrdg-company-special-model-501\/","title":{"rendered":"JRDG Company Special – Model 501"},"content":{"rendered":"

<\/b>Model 501\u00a0(approx 2002-2012)
\n<\/strong>Retail price in 2007\u00a0in Germany 4.698 euro per amp<\/p>\n

\"rowland-model-501-front_550pix\"<\/p>\n

Model 501 looks similar to the Model 201 but is slightly larger in all dimensions.\u00a0The 501 is a bigger version of the 201, utilizing a higher powered 500ASP ICE-power module. As far as I know there is no difference with the 201’s except that a higher-powered version of the ICE module is used. I haven’t listened to it but I hear from friends that it indeedsounds more powerful than the 201 but may also sound a little more technical. But this is hearsay, not a fact.<\/p>\n

Class AB versus Class D (link to be added)<\/p>\n

Model 501 Inside Pics<\/h2>\n

\"rowland-model-501-detail_550pix\"<\/p>\n

\"rowland-model-501-2_550pix\"<\/p>\n

\"rowland-model-501-1_550pix\"<\/p>\n

Model 501\u00a0Gain Settings<\/h2>\n

Below descriptions indicate model 201, but they also apply to model 501.<\/p>\n

\"rowland-201-set-gain-1\"<\/p>\n

\"rowland-201-set-gain-2\"<\/p>\n

Model 501 Features<\/h2>\n

XLR input connector for balanced system configurations. Same gain and input impedance characteristics are ensured whether XLR or RCA adapted inputs are used.<\/p>\n

Transformer coupled input provides universal compatibility with other components and eliminates ground loop noise and EMI.<\/p>\n

High efficiency ICEpower\u00ae power conversion technology generates high output power with very little heat, promotes long component life and permits a relatively small physical size.<\/p>\n

Multistage AC line filtering in power supply reduces AC line noise pollution throughout amplifier signal circuitry.<\/p>\n

CE approved speaker output terminals require no tools for secure, low resistance connections.<\/p>\n

Fully-balanced topology implemented in both input and output circuitry.<\/p>\n

Proprietary switch-mode power supply technology ensures consistent performance under all operating and AC line conditions.<\/p>\n

Low power consumption permits constant power-up operation to eliminate warm-up time.<\/p>\n

Selectable overall gain of 26 or 32 dB.<\/p>\n

Ultra-low resonance, structurally rigid chassis, precision-machined from a solid block of aircraft grade 6061-T6 aluminum.<\/p>\n

Remote ON\/OFF input jack allows amplifier standby operation from a remote source for inclusion into home theater (A\/V) systems.<\/p>\n

Model 501 Specifications<\/h2>\n

Output Power, Continuous RMS<\/strong>
\n500 watts @ 8 ohms,
\n1000 watts @ 4 ohms<\/p>\n

Frequency Response<\/strong>
\n5 Hz \u2013 45 kHz, -3 dB @ 8 ohms<\/p>\n

Peak Output Current<\/strong>
\n40 amps<\/p>\n

Dynamic Range<\/strong>
\n120 dBa<\/p>\n

Load Impedance Range<\/strong>
\n2 ohms \u2013 16 ohms Input Impedance 40k ohms<\/p>\n

THD + Noise, 0.1 watts \u2013 500 watts, 4 ohms<\/strong>
\n< 0.1%, Typically .01% @ 1 kHz CCIF Intermodulation Distortion, 19\/20 kHz < .002%<\/p>\n

Damping Factor<\/strong>
\n@ 1 kHz > 1000<\/p>\n

Overall Gain (Balanced or Unbalanced)<\/strong>
\nSelectable Internal Jumper, 26 or 32 dB<\/p>\n

Common Mode Rejection Ratio<\/strong>
\n> 90 dB, 20 Hz \u2013 20 kHz<\/p>\n

Absolute Phase<\/strong>
\nNon-inverting, Pin 2 Positive<\/p>\n

Inputs<\/strong>
\n1 Balanced (XLR) (Unbalanced operation requires an optional XLR to RCA adapter)<\/p>\n

Outputs<\/strong>
\n1 CE-Approved Speaker Wire Clamp<\/p>\n

Power Consumption<\/strong>
\nIdle \u2013 15 watts,
\nMaximum \u2013 1300 watts<\/p>\n

Amplifier Weight<\/strong>
\n17 lbs. \/ 7.8 kg<\/p>\n

Overall Amplifier Dimensions (H) x (W) x (D)<\/strong>
\n3.3\u201d x 8.4\u201d x 14.6\u201d
\n85mm x 213mm x 372mm<\/p>\n

More Jeff Rowland<\/h2>\n

Jeff Rowland Company Special Main Page
\n<\/a>Jeff Rowland Company Special Power Amplifiers
\n<\/a>Class AB vs Class D – Model 525 compared to Model 201, Model 10 and Model 6
\n<\/a>Trends TA-10.2, Wadia 151, Jeff Rowland 102 and OEM ICE Power module compared<\/a><\/p>\n

Also Read<\/h2>\n

“Digital” Switching Class D or Class T Amplifiers<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Model 501\u00a0(approx 2002-2012) Retail price in 2007\u00a0in Germany 4.698 euro per amp Model 501 looks similar to the Model 201 but is slightly larger in all dimensions.\u00a0The 501 is a bigger version of the 201, utilizing a higher powered 500ASP ICE-power module. As far as I know there is no difference with the 201’s except […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":8319,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-9313","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.hifi-advice.com\/blog\/wp-json\/wp\/v2\/pages\/9313","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hifi-advice.com\/blog\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.hifi-advice.com\/blog\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.hifi-advice.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hifi-advice.com\/blog\/wp-json\/wp\/v2\/comments?post=9313"}],"version-history":[{"count":8,"href":"https:\/\/www.hifi-advice.com\/blog\/wp-json\/wp\/v2\/pages\/9313\/revisions"}],"predecessor-version":[{"id":9838,"href":"https:\/\/www.hifi-advice.com\/blog\/wp-json\/wp\/v2\/pages\/9313\/revisions\/9838"}],"up":[{"embeddable":true,"href":"https:\/\/www.hifi-advice.com\/blog\/wp-json\/wp\/v2\/pages\/8319"}],"wp:attachment":[{"href":"https:\/\/www.hifi-advice.com\/blog\/wp-json\/wp\/v2\/media?parent=9313"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}