{"id":9528,"date":"2010-04-26T14:47:08","date_gmt":"2010-04-26T12:47:08","guid":{"rendered":"http:\/\/www.hifi-advice.com\/blog\/?page_id=9528"},"modified":"2024-11-16T23:51:24","modified_gmt":"2024-11-16T21:51:24","slug":"jrdg-company-special-model-125","status":"publish","type":"page","link":"https:\/\/www.hifi-advice.com\/blog\/jeff-rowland-power-amplifiers\/jrdg-company-special-model-125\/","title":{"rendered":"JRDG Company Special – Model 125"},"content":{"rendered":"

<\/b>Model 125 (2013-present<\/b>)
\n<\/strong>Retail price in 2024 in the Netherlands 5.400 euro<\/p>\n

A replacement for the 102, the 125 is a 100W class D stereo amp, based on the most recent ICEpower technology (250ASX2 module).<\/p>\n

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\"Rowland-Capri2s-125_550pix<\/p>\n

\"Rowland-Capri2s-125_550pix<\/p>\n

Model 125 and Capri s2 during a test in my listening room. In short: like the 102 the 125 is much more powerful than it looks. The 125, however, sounds bolder and timbrally more natural\u00a0than its predecessor the 102.<\/p>\n

Model 125 extensive review<\/a><\/p>\n

\"rowland-125-in-avalon-setup-2_550pix\"<\/p>\n

Model 125 driving Avalon Transcendent speakers and fed by\u00a0a dCS Vivaldi system and a Capri s2 preamp during a Munich hifi show.<\/p>\n

\"rowland-125-front-l_550pix\"<\/p>\n

\"jrdg_carpi-s2-and-model-125-clean-2_550pix\"<\/p>\n

Capri s2 on top of Model 125<\/p>\n

\"Rowland-Capri2s-125_550pix<\/p>\n

\"rowland-125-0928jrdg_carpi_m12508_550pix\"<\/p>\n

\"rowland-125-rear-l_550pix\"<\/p>\n

\"rowland-125-0928jrdg_carpi_m12510_550pix\"<\/p>\n

\"rowland-125-inside-0928jrdg_carpi_m12521_550pix\"<\/p>\n

\"rowland-125-inside-0928jrdg_carpi_m12520_550pix\"<\/p>\n

\"rowland-125-inside-0928jrdg_carpi_m12519_550pix\"<\/p>\n

Model 125 Features<\/h2>\n

MACHINED ALUMINUM CHASSIS
\nPrecision-machined from a solid block of aircraft grade 6061-T6 aluminum, provides exceptional thermal heat transfer\/dissipation, RFI\/EMI shielding, and resonance control.<\/p>\n

BALANCED TOPOLOGY
\nInherent cancellation effects of balanced topology implemented throughout all power and input\/output circuits ensures greatly reduced distortion and noise under dynamic signal conditions.<\/p>\n

HIGH-PRECISION SURFACE MOUNT COMPONENTS
\nExtensive use of Lead (Pb)-free, low-temperature coefficient, active and passive surface-mount components results in significantly smaller loop areas, reduced circuit capacitance and inductance, and introduces less noise than conventional leaded components.<\/p>\n

TEFLON COATED WIRES
\nAll signal carrying input and output wires are Teflon coated, also for low dielectric energy storage, further ensuring that each audio note reproduced naturally decays into the deeper silence of the music.<\/p>\n

TRANSFORMER-COUPLING AND ISOLATION
\nTransformer coupled input circuitry provides universal component compatibility and virtually eliminate ground loop noise and RFI\/EMI. Transformer coupling ensures identical amplifier overall gain when using unbalanced input adapters.<\/p>\n

HIGH-EFFICIENCY SWITCH-MODE POWER SUPPLY
\nHighly efficient, compact, lightweight, switch-mode power supply provides optimum voltage regulation for all circuits and operating conditions and allows for quiet operation over a wide range of AC mains power sources.<\/p>\n

PARALLEL BINDING POSTS
\nCE approved speaker output terminals require no tools for secure, low resistance connections, and allow for easy bi-wiring applications.<\/p>\n

FLEXIBLE 15 AMP AC POWER
\n15 Amp AC power inlet accepts a wide variety of after-market high-performance power cables.<\/p>\n

FRONT PANEL STANDBY BUTTON
\nIlluminated front panel push-button switches the amplifier into standby mode (< 1 watt consumption).<\/p>\n

REAR PANEL REMOTE JACK
\n12V 3.5mm jack on rear panel permits amplifier power on\/standby switching in remote and home theater applications.<\/p>\n

Model 125 Technical Specifications<\/h2>\n

Output Power (Stereo)
\n125 watts @ 8 ohms \/ 250 watts @ 4 ohms<\/h4>\n

Output Power (Bridge-tied Load)
\n500 watts @ 8 ohms BTL<\/h4>\n

Frequency Response
\n5 Hz \u2013 130 kHz, -3dB<\/h4>\n

Input Impedance
\n40k ohms<\/h4>\n

THD + Noise
\n< 0.008% @ 1kHz<\/h4>\n

Damping Factor
\n> 500, @ 1kHz<\/h4>\n

Overall Gain
\n26<\/h4>\n

Amplifier Weight
\n7.8 lbs. \/ 3.5 kg<\/h4>\n

Overall Amplifier Dimensions (h\/w\/d)
\n2.7\u201d x 13.7\u201d x 7.5\u201d \/ 68mm x 348mm x 190mm<\/h4>\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>Model 125 Extensive review<\/a><\/p>\n

Also Read<\/h2>\n

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

Model 125 (2013-present) Retail price in 2024 in the Netherlands 5.400 euro A replacement for the 102, the 125 is a 100W class D stereo amp, based on the most recent ICEpower technology (250ASX2 module). Model 125 and Capri s2 during a test in my listening room. In short: like the 102 the 125 is […]<\/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-9528","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.hifi-advice.com\/blog\/wp-json\/wp\/v2\/pages\/9528","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=9528"}],"version-history":[{"count":9,"href":"https:\/\/www.hifi-advice.com\/blog\/wp-json\/wp\/v2\/pages\/9528\/revisions"}],"predecessor-version":[{"id":39211,"href":"https:\/\/www.hifi-advice.com\/blog\/wp-json\/wp\/v2\/pages\/9528\/revisions\/39211"}],"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=9528"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}