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Description
Pre-Amplifier Speaker Distributor, 2 In 8 Out Switcher, Speaker Comparator, Signal Booster, With Volume Control And Earphone 16-600 ohms / Monitor Function 2-Channel Signal Switching InputProduct function introduction 1. The B981 is a powerful 8 channel high power pre amplifier which has dual sound input with a selector switch. 2. The product provides an independent 3. 5mm stereo earphone jack which can drive a variety of high impedance professional monitor earphones well. 3. Each channel can drive 16ohm 600 ohm and provide 8 stereo channels for output. 4. There are four independent volume knob adjustments to control the 8 channel for
Product function introduction1. The B981 is a powerful 8-channel high-power pre-amplifier which has dual-sound input with a selector switch.
2. The product provides an independent 3.5mm stereo earphone jack which can drive a variety of high-impedance professional monitor earphones well.
3. Each channel can drive 16ohm -600 ohm and provide 8 stereo channels for output.
4. There are four independent volume knob adjustments to control the 8-channel for simultaneous level signal output, presenting the rich sound quality, well-balanced bass, clear high frequency, and no other signal popping phenomenon, and ensuring lossless and undistributed sound.
5. It can provide +20dB high gain through any line level signal source, allowing running through longer cable lines or "buffering" to solve low volume problems.
6. You can use the product to connect line level signal source and power amplifier as a volume controller.
7. The RCA socket can match almost all other product interfaces. The product is powered by an AC AC9V transformer.
Product parameters
1. Input impedance: 100K Ohm
2. Input level: +14 dBV
3. Output impedance: 47 Ohm per output channel
4. Frequency response: 20 Hz - 20K Hz
5. Signal to noise ratio: Above 107dB
6. Total harmonic distortion: Less than 0.08%
7. Inter-modulation distortion: Less than 0.01%
8. Signal input: Two sets of stereo RCA socket
9. Signal output: Six sets of stereo RCA connectors and two sets of 3.5mm stereo earphone jack
10. Product power supply: AC 9V-12V
11. 4 independent channel stereo level volume output controlling knobs
12. Product net weight: 0.68kg
13. Packaged product weight: 0.82g
15. Product dimensions: Length 145mm x width 112mm x height 42mm
16. Packing dimensions: Length 260mm x width 185mm x height 65mm
Kit list
1. B981 Professional 8-channel preamp signal-amplifier speaker distributor x 1
2. AC9V Power adapter (US standard) line length 100CM x 1
Specification:
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4.0 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
Wake Up
Format: Hardcover
Great read. Puts a lot of things into perspective. I truly don't understand how someone could be dense enough to support liberal elites. They truly only want the worst for this country. Crazy to think about how so many people can be so brainwashed.
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Reviewed in the United States on April 24, 2025
★★★★★ 5
Excellent job!!!
Format: Kindle
I am not normally a fan of nonfiction books, real life is just too real! So I normally stick with fiction books that a good author makes up. But I must say here and now "I Really enjoyed reading this book"!! I kept telling my husband, " you really going to enjoy this book"! I couldn't hardly put it down! Mr. D'Souza is a very fine writer. I would recommend this book to everyone. A very, very good read!!!!!!!
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Reviewed in the United States on October 23, 2024
★★★★★ 5
Fabulous book
Format: Kindle
Explains in an easy to understand way so many facts about the dramatic and dangerous situation we are facing in our country right now. Dinesh vast knowledge of history ties in decisive moves in the past with our current alternatives.
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Reviewed in the United States on October 16, 2024
★★★★★ 5
The author emphasizes Trump’s good qualities.
Format: Hardcover
Excellent book.
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Reviewed in the United States on August 21, 2025
★★★★★ 5
Dispassionate, Authoritative & Delightful
Format: Hardcover
Impartial: This dispassionate history of the Supreme Court should be read by everyone genuinely concerned about the future of our country and the rule of law. It's impartiality will likely infuriate those on the Left or Right who would prefer to vilify and demolish this branch of our government. There are plenty of books out there that will support your rage. But this book is a deep breath of fresh air.
I speak as a member of the bar of the Supreme Court, a retired federal judge, and a lifelong Democrat. The Most Powerful Court In the World (an accurate title) It is the first serious and nonpartisan book written about the Supreme Court in at least the last 30 years. Chock full of details and yet eminently readable.
Context: Law Professor Banner puts today's Court in its historical context, demolishing the proposition that in the good old days the Court was a quiet and apolitical sanctum of wisdom and that it has only recently become controversial and political. It's been extremely controversial since at least 1803. Banner's recounting of the historical facts (including wonderful anecdotes) lifts the reader from the immediate tumult of 2024 headlines and provides us with the long view of the Court and the evolution of the law and the Court. Examples include:
1. Court packing (it started with John Marshall in 1801) and manipulating the number of Justices to help, or prevent, Presidential agenda's and appointments (1801).
2. Diversity on the Court (regional, religious, racial, gender)
3. Reconstruction and Jim Crow.
4. The Commerce Clause revolution and its sequel.
5. The rise of individual liberty litigation and decisions in the 20th century, starting with the novel idea of applying the Bill of Rights to the States. Religion, free speech, Roe, Dobbs.
5. The winning judicial strategies for challenging racial discrimination, sexual and gender discrimination and LGBTQ+ discrimination cases to the Court and their current erosion. Affirmative action and its demise.
6. The fact that the Court (composed of lawyers who are taught to revere history, precedent and law) has been a conservative institution for its entire history except for 15 years right after FDR when, for a short interval, it moved to the Left.
7. Movements to reform the Court (age limits, more justices, Congressional veto, jurisdiction stripping) have been perennial. Including Biden's Presidential Commission Report of 2021.
8. The fact that the Justices are human beings who have hobnobbed with the President, VP, Senators, Politicos and Business people forever. Frankfurter played poker with FDR, Douglas took a $12,000 per year salary from the owner of a Las Vegas Casino, Fortas took $20,000 per year from Louis Wolfson, who was later convicted and sent to prison. Spouses who worked for law firms that appeared before the Court.
The reader will note that in his discussion of every case, especially the modern ones, Professor Banner provides a representative and pithy quote from the Majority decision and from the dissent. He recounts them fairly and does not take sides. He lets the reader think about it.
This book is a delightful change from the norm for modern SCOTUS literature - which is either a partisan hatchet job by a journalist or professor, a compendium of gossip from the law clerks willing to talk, or the warm and neutral memoire or musings of a current Justice trying to make a buck or a former Justice burnishing his or her place in history. Banner gives you as straight, objective and unvarnished a history as you are likely to get these days. It is not a hit-job. It is not a hagiography.
The Most Powerful Court in the World should be required reading for any student of the Supreme Court.
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Reviewed in the United States on November 26, 2024