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Bakoon Products AMP-7511A Power Amplifier

Product code: amp7511a-1

Bakoon Products AMP-7511A Power Amplifier

Regular price ¥390,000 円
Regular price Sale price ¥390,000 円
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Reproduction Method
Attenuator Specifications
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This is a made-to-order product. Estimated delivery time is 3~7 business days.
Please note that the delivery date may be delayed depending on the manufacturer's order status.

High-precision power amplifier without coloration

Circuit with organic semiconductor capacitors

Description

The AMP-7511A was developed as an anniversary model to commemorate the 25th anniversary of the company. The AMP-7511A is a high-precision power amplifier without coloration that takes advantage of the lack of lead wires by actively employing surface-mount components.

The AMP-7511A's capacitors use a large number of organic semiconductor capacitors OS-CONO to enable even higher precision reproduction.

The AMP-7511A is available in two types: a normal type with 25W stereo output and a BTL type with 50W monaural output. The BTL type uses a push-pull stereo amplifier to achieve a much higher output and distortion-free sound. The front side of the BTL amplifier is the same as the stereo type, but the back side is mono-compatible.

There are two voltage inputs and two current inputs (SATRI-LINK input).

The voltage input is used to connect analog voltage signals from CD players, etc. The SATRI-LINK input is a current transmission standard standard standardized by Bakun Products, and by connecting to a device with a SATRI-LINK output, such as the company's D/A converters and RIAA equalizers, the BTL amplifier can provide an enormous amount of music that cannot be obtained with voltage transmission. By connecting to a device with SATRI-LINK output, such as a D/A converter or RIAA equalizer from Bakun Products, a huge amount of music information that could not be obtained by voltage transmission can be obtained.

The gain controller can be selected between a VR type and an attenuator ATT type; the ATT type provides more accurate reproduction than the VR type. The input selector can switch between voltage input and SATRI-LINK.

Spec
Maximum Output 25W (8Ω)
Input impedance 100KΩ
Input 2 voltage inputs
SATRI-LINK (current input) 2 systems
Frequency Characteristics 10Hz - 100KHz
Size W350 x H90 x D430 mm
Weight Approx. 5 kg

*Stereo and BTL switching is set when the amplifier board is manufactured, so the specifications cannot be changed by the customer.

Review

The output figure of the Baccoon amplifier is just that, a number. It provides tremendous driving power freely to medium and large speakers at low output. This is possible because of the extreme precision of the bias. Another feature of the SATRI circuit is its flat frequency bandwidth with no feedback. What does the 25W AMP-7511A sound like? Would it be closer to the SCA-7511 MK3 with 15 watts, or to the AMP-5521 with 35 watts? In conclusion, it was a new Bakoon sound that I had never experienced before. First, listening to Diana Krall's "Desperado" (from the album "Wallflower"), one can hear the clear, pure sound like spring water that is characteristic of Bakoon. Krall's voice is much softer, warmer, and liquid than the existing bakoon. It is clear that the tone has been tuned to produce warmth. It is also worth noting that the center of gravity of the reproduced sound is set very low. The sound does not swing upward at all. It is amazing that a single amplifier, rather than a pre-power separate amplifier, can reproduce such a low stage.
Brian Bromberg's "Come Together" (Wood album) has a slightly larger sound image and gives the impression of using a wide stage. Imaging and focusing clearly outperform the SCA-7511 MK3. This is the sound experienced when the preamplifier is attached to the SCA-7511 MK3. In this respect, it is clear that the AMP-7511A is a direct descendant of the advanced AMP-5521.

On "Our Spanish Love Song" with Pat Masney and Charlie Haden (from the album Beyond The Missouri Sky), the sound is clearly defined with little clutter. The sound of bakun, without coloration or distortion, seems to have finally been perfected on the anniversary. Overall, the sound reproduction is softer than that of the SCA-7511 MK3; if the SCA-7511 MK3 is a young man in his twenties with a hot-blooded spirit, the AMP-7511A is a woman in her forties with a refined nostalgia.

I wondered how they would do with large-scale music, so I listened to Mahler's Symphony No. 2, 1st movement, conducted by Leonard Bernstein with the New York Philharmonic in 1987 (DG album). At the beginning, the bass and cello bass stages are completely thrown out of the right speaker. The stage is that wide. The darkness of the background is amazing. At this point, when I turned up the volume from 9:30 to 10:30, the playback sound instantly improved. The body of the orchestra, the synthesis of the brass instruments, the brilliance of the cymbals, the powerful punch of the timpani. The bakoon also has the flavor of playing "hard" when necessary. The delicate rendering of weak notes is fine, but the sense of power coming from the 25W output amplifier is the number one contribution that made Bakun what it is today. It is really smooth and understated.

In the Exploration Ensemble's "Variations on Rossini's Tears," the production is first of all greatly developed. Listening to the piano, one can see the magnificent stage of a grand piano, which cannot be imitated by an upright piano. What surprised me in this piece, however, was the articulation of the cello. As usual, I was admiring, 'You're killing the cello's tone,' when suddenly the illusion developed that the strings were humming their own melody. The resonance of the strings and the body, the reverberation, the tremor, the nuance, the detail, all of it was delivered to the author in an instant. It is an enormous amount of information. However, these are virtues that can only be obtained with a high-end preamplifier. In short, the reproduction of this piece was the best I have heard in the dozens of times I have listened to it.