Descripción
Ribbons for a Reason
The world’s first True Ribbon headphones with Earfield technology. Take mixing, mastering, and home listening into a different league, with unparalleled power and realism of True Ribbon drivers. Reference accuracy is projected with Earfield technology for a speaker-like soundfield experience, unlike anything heard before.
The SR1a is the world’s first True-Ribbon™ headphone. Highly specialized ribbon drivers were developed that reproduce 30Hz to 30kHz bandwidth in order to eliminate the need for sealed chambered bass and allow for open air baffles (both front and back) for a true full-frequency soundfield.
SR1A Freedom
Professional engineers report that SR1a Earfield Monitors™ reveal more detail and accuracy than even their finest traditional studio monitors or headphones. Helping to achieve high-quality, transferable mix results in non-traditional environments. The accuracy, musicality and portability of the SR1a frees the engineer to work whenever, and wherever they choose.
Incredibly Comfortable
Weighing in at only 425 grams (15 ounces). Unlike standard headphones whose weight and heat create listener discomfort over time. The SR1a Earfield™ design eliminates heat buildup on the ears providing a cool, natural airflow. Your ears will also appreciate the complete absence of sound pressure against the eardrums caused by traditional sealed can designs. SR1a headphones can be worn comfortably for many hours at any listening level.
Finest Materials. Hand Built
The SR1a features; carbon fiber baffles, stainless spring steel headband, aluminum ribbon drivers, plush memory foam bars, and lambskin leather (non-leather option available). Every SR1a is expertly handmade, in Serbia, by the skilled European craftspeople who build world-renowned RAAL ribbon tweeters.
SPECIFICATIONS
|
Headphone Design:
|
Earfield™ open baffle. Floating near ear, does not enclose ears.
|
|
Impedance:
|
0.2 Ohms with cabling. Used in series Ribbon/Amplifier Interface.
|
|
Amplifier Interface:
|
Ribbon/Amplifier Interface. 6 Ohms. Use any loudspeaker amplifier.
|
|
Amplifier power rating:
|
100W
|
|
Sensitivity:
|
91dB/1W
|
|
Max SPL:
|
111 dB
|
|
Frequency Range:
|
30Hz – 30kHz
|
|
Weight:
|
425 grams
|
REVIEWS
JOTUNHEIM R Headphone Amplifier
Designed Especially for RAAL-requisite True-Ribbon Headphones
This amp was designed for one kind of headphones only: the RAAL-requisite ribbon headphones. Delivering up to 13A (amps…yes, amps) per channel into RAAL’s extremely low impedance load, and including the baffle compensation needed for the SR1a. It means you can leave your speaker amp behind, forget the RAAL-requisite interface box, and, if you buy it with the optional True MultibitTM DAC, you have a one-box system that’s easily transportable.
Configure To Your Needs
Select Jotunheim R as “just an amp,” or add an internal DAC to tailor the system to your needs.
- No DAC.If you already have a DAC, or don’t need one, choose Jotunheim R without a DAC module or external DAC, for $799.
- True Multibit DAC module (internal).Choose the optional Multibit DAC Module to get Schiit’s unique digital filter and multibit DAC architecture, for $200 more.
Flexibility and Convenience
Jotunheim R provides switchable baffle compensation, to ensure compatibility with future ribbon headphone models, as well as switchable passive preamp outputs, and both balanced and single-ended inputs. No power bricks or external power supplies are required; it plugs straight into the wall for maximum convenience.
Unique Nexus™ Discrete Gain Stage with Ultra-High-Current Output
This inherently balanced, differential, current feedback topology accepts both balanced and single-ended input without the need for splitters and summers.
Designed and Built in California
By “designed and built in California” this is what we mean: the vast majority of the total production cost of Jotunheim—chassis, boards, transformers, assembly, etc—goes to US companies manufacturing in the US. Our chassis are made minutes from our facility. Our PCBs are done just over the hill from us, or done in NorCal. Our transformers are also made in California. You get the picture.
5-Year Warranty and Easy Return Policy
Jotunheim R is covered by a 5-year limited warranty that covers parts and labor. And if you don’t like your Jotunheim R, you can send it back for a refund, minus 5% restocking fee, within 15 days of receiving it.
SPECIFICATIONS
|
Amplifier:
|
|
|---|---|
|
Frequency Response:
|
20Hz-20Khz, +/-0.1db, 2Hz-500KHz, -3dB, baffle compensation off into SR1a load
|
|
Maximum Current, SR1a load:
|
13.2A per channel, both channels driven, at clipping (10% THD)
|
|
THD:
|
<0.0005% at 32 ohms, 1V
|
|
THD at 0.2A output into SR1a:
|
<0.014%
|
|
THD at 1A output into SR1a:
|
<0.026%
|
|
IMD:
|
<0.02% at 0.2A output current, <0.04% at 1A output current into SR1a
|
|
SNR:
|
>110dB, referenced to 3A output
|
|
Crosstalk:
|
>-65dB, 20 Hz-20KHz, when loaded with SR1a
|
|
Output Impedance:
|
Less than 0.015 ohms
|
|
Input Impedance:
|
50K ohms
|
|
Gain:
|
2 (6dB)
|
|
Inputs:
|
Balanced XLR and Single-Ended RCA, selectable via front switch
|
|
Outputs:
|
Balanced Raal headphone (4-pin male XLR), balanced passive preamp, single-ended passive preamp
|
|
Optional Inputs:
|
True Multibit™ DAC
|
|
Gain Stage:
|
Proprietary Schiit Nexus™ fully discrete differential current-feedback topology
|
|
Power Supply:
|
One 48VA transformer with 6 stages of discrete or integrated regulation and over 120,000uF total filter capacitance
|
|
Protection:
|
Hall Effect current sensor for overcurrent conditions, triggering at 31A, plus integrated thermostat triggering at 95 degrees C
|
|
Multibit DAC:
|
|
|---|---|
|
USB Input Receiver:
|
C-Media CM6631A
|
|
D/A Conversion IC:
|
Analog Devices AD5547
|
|
Digital Filter:
|
Schiit Time- and Frequency-domain Optimized DSP filter
|
|
Input Capability:
|
up to 24/192
|
|
Analog Output:
|
Fully differential, active summing and filtering
|
|
Frequency Response:
|
20Hz-20KHz, +/-0.25dB, 2-100kHz, -3dB
|
|
THD:
|
<0.005%, 20Hz-20KHz, full scale
|
|
IMD:
|
<0.006%, CCIR
|
|
S/N:
|
>109dB, referenced to 2V RMS, unweighted
|
|
|
|
|
Power Consumption:
|
45W maximum
|
|
Size:
|
9” x 6” x 2”
|
|
Weight:
|
7 lbs
|
