Model 525 Stereo Amplifier Features and Specifications

A bridgeable power amplifier that delivers stunning dynamic realism and expressive refinement. Housed in a chassis milled from a solid block of aircraft-grade aluminum, the Rowland Model 525 features a topology that is as advanced as it is efficient.

From a single Model 525 in stereo mode at the core of an intimate audio system, up to multiple bridged units powering a complex home theater setup, down to a bridged pair driving a sophisticated two-channel environment, the Model 525 delivers exquisite resolution, authority, and control to speakers of almost any size and any load.

TECHNICAL FEATURES

Machined aluminum chassis

Precision-machined chassis with integrated heat-sinks, milled from a solid block of aircraft grade aluminum, provides exceptional thermal heat transfer/dissipation, RFI/EMI shielding, resonance control, and minimizes micro-phonically induced micro-vibrations from any source.

Ceramic input circuit board
Input circuitry comprised of a precision instrumentation amplifier is implemented on mil-spec, low dielectric constant, Rogers™ ultra-rigid ceramic circuit board substrate for extremely low energy retention and absorption.

Balanced topology
Inherent cancellation effects of balanced topology implemented throughout all power and input/output circuits ensures greatly reduced distortion and noise under dynamic signal conditions.

High-Precision Surface Mount Components
Extensive 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.

Thin-film resistors
All resistors are low noise, 0.1% thin-film type for extremely low thermal noise which complement the low-noise characteristics of the active circuitry.

Teflon Coated Wires
All 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.

Transformer-coupling and isolation
Transformer 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.

Active power factor correction (PFC)
Power Factor Correction (PFC) integrated into the power supply reduces AC line harmonic noise pollution and increases AC line power utilization to 99%.

High-efficiency switch-mode power supply
Highly efficient, compact, light weight, 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.

Flexible 15 Amp AC Power
15 Amp AC power inlet accepts a wide variety of after-market high-performance power cables.

Binding posts
CE approved speaker output terminals require no tools for secure, low resistance connections.

Front panel standby button
Illuminated front panel push-button switches the amplifier into standby mode (<1 watt consumption). An internal switch allows the user to dim the front panel indicator light "ring" or shut off the light altogether when the amplifier is powered on.

Remote on/off
A 1/8” (3.5mm) mini plug connector on rear panel permits amplifier power on/standby switching in remote and home theater applications.

SPECIFICATIONS

Output Power
250 watts @ 8 ohms / 500 watts @ 4 ohms
950 watts @ 8 ohms BTL (bridge-tied load)

Frequency Response
5 Hz – 70 kHz, -3 dB

Input Impedance
40k ohms

THD + Noise
< 0.05%, 20 Hz -20 kHz

Damping Factor
> 1000 @ 1 kHz

Overall Gain / Bal. or Unbal.
26/32 dB BTL

Inputs
1 pair Balanced (XLR)

Outputs
1 pair parallel binding posts

Amplifier Weight
14.5 lbs. / 6.6 kg

Amplifier Dimensions
2.85” x 8.4” x 13” / 72mm x 213mm x 330mm


Related Articles

Attachments

No attachments were found.

Visitor Comments

Article Details

Last Updated
28th of September, 2013

Would you like to...

Print this page  Print this page

Email this page  Email this page

Post a comment  Post a comment

 Subscribe me

Subscribe me  Add to favorites

Remove Highlighting Remove Highlighting

Edit this Article

Quick Edit

Export to PDF


User Opinions



How would you rate this answer?




Thank you for rating this answer.

Continue