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Description
Helix C FOUR - 4 Channel High-End AmplifierAudiophile sound quality combined with impressive output power The C FOUR is a high end 4 channel amplifier that has been designed down to the last detail for ultimate sound quality. Audiotec Fischers proprietary ultra low noise and ultra low distortion Class A driver stage feeds a total of 32 hand selected MOSFET power transistors, resulting in an incredible damping factor of 1,000 for relentless control of every loudspeaker. The intelligent
Audiophile sound quality combined with impressive output power
The C FOUR is a high-end 4-channel amplifier that has been designed down to the last detail for ultimate sound quality. Audiotec Fischer’s proprietary ultra low-noise and ultra low-distortion Class A driver stage feeds a total of 32 hand-selected MOSFET power transistors, resulting in an incredible damping factor of 1,000 for relentless control of every loudspeaker. The intelligent regulation of the power supply assures stable conditions for the output stages and therefore phenomenal output power independent of the cars battery voltage.
In combination with the optionally available digital input module HDM 2, the C FOUR demonstrates the perfect transition to the digital era. The HDM 2 accepts digital audio signals up to 96 kHz sampling rate via its two optical inputs followed by cutting-edge BurrBrown D/A converters with 32 Bit resolution that transform the signals back to the analog domain. Therefore the C FOUR is absolutely future-proof and perfectly prepared for the combination with our digital signal processors.
- Extremely broadband Class AB amplifier with eight selected MOSFET transistors per channel for exceptional sound quality - ideal for High-Resolution audio
- Ultra low-noise and distortion-free power amp drivers in Class A technology
- Enormous damping factor of 1,000 @ 4 Ohms for perfect speaker control
- Optionally available HELIX Digital Input Module (HDM) to extend the amplifier with two optical digital inputs in SPDIF format
- Integrated, active crossover with highpass, lowpass and bandpass
- Regulated DC / DC switching power supply with Start-Stop capability down to 6V supply voltage
- Microprocessor-based monitoring of amplifier status including temperature-dependent fan control
- Input Mode switch for flexible routing of the input signals
- Cutting-edge BurrBrown D/A converters with 32 Bit resolution in combination with the optional HDM 2 module
- Massive 24-carat gold-plated power and speaker terminals
- Quad-layer PCB with extra-solid 70μ copper traces for lowest possible losses and SMD (Surface Mounted Device) manufacturing technology
Special features:
Start-Stop capability
The switched power supply of the HELIX C FOUR assures operation even if the battery’s voltage drops down to 6 Volts during engine crank.
High-Resolution audio
The extremely broadband audio bandwidth of the amplifier ensures a lossless audio reproduction of High-Resolution audio content to provide the best possible sound in studio quality.
| Output power RMS / max. | |
| - @ 4 Ohms | 4 x 150 / 300 Watts |
| - @ 2 Ohms | 4 x 220 / 440 Watts |
| - @ 1 Ohm | - |
| - bridged @ 4 Ohms | 2 x 440 / 880 Watts |
| - bridged @ 2 Ohms | - |
| Amplifier technology | Class AB |
| Inputs | 4 x RCA / Cinch 1 x Remote In Optional via HDM 2 module: 2 x Optical SPDIF (28 - 96 kHz) |
| Input sensitivity | RCA / Cinch 1 - 8 Volts |
| Input impedance RCA / Cinch | 7.5 kOhms |
| Input impedance highlevel | - |
| Outputs | 4 x Speaker output |
| Output voltage RCA / Cinch | - |
| Signal converter for digital input | - |
| Frequency response | 10 Hz - 80,000 Hz |
| Bass boost | - |
| Highpass | 15 Hz - 4,000 Hz adjustable |
| Lowpass | 15 Hz - 4,000 Hz adjustable |
| Bandpass | 15 Hz - 4,000 Hz adjustable |
| Subsonic | - |
| Phase | - |
| Slope high- / lowpass | 12 dB/Oct. |
| Slope subsonic / lowpass | - |
| Signal-to-noise ratio digital input | - |
| Signal-to-noise ratio analog input | 112 dB (A-weighted) |
| Distortion (THD) | < 0.007 % |
| Damping factor | > 1000 |
| Operating voltage | 9 - 16 Volts (max. 5 sec. down to 6 Volts) |
| Idle current | 2400 mA |
| Fuse | 3 x 30 A LP-Mini-fuse (APS) |
| Additional features | Active, adjustable crossover, HDM slot, input mode switch, High-Resolution audio, Start-Stop capability |
| Dimensions (H x W x D) | 37.1 x 430 x 240 mm / 1.46 x 16.93 x 9.45" |
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Exchange/Return Notes
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4.5 ★★★★★
Based on 23 reviews
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Product Reviews
★★★★★ 4
fallen destiny? more like destined to fall in love
Format: Kindle
Kieran is an angel, but she doesn't have an affinity. Nothing angers her father more. If she doesn't find an affinity soon she will be cast to earth & have her wings removed. But she has the choice to become a fallen angel, wings turn black, & live her life on edge.
Towards the end of the book things start to make sense. Gabe’s nickname for Kieran, Steele’a hatred, Bastian’s belief that Kieran is powerful. This book ended literally during a war? As one of her friends was injured, and admitted a bit secret? Talk about cliff hanger. The next book comes out August 5th.
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Reviewed in the United States on July 8, 2024
★★★★★ 5
Well holy moly!
Format: Kindle
Holy moly that story definitely had me hooked!
Kieran was definitely a character that I immediately adored. She has obviously had to deal with a butt load of too high expectations from her father (who is 🤬)..
She has been helpless when it came to finding out her affinity with so many years of no answers & perceived failure. When Ronan, gives her a small inkling of hope that she be a Beast Tamer, she jumps into it. But again she doesn’t seem to fit.
But when she runs into Gabe again, she ends up helping him & rethinking her life in Alfemir. And when the opportunity comes she decides leaving is the best option. But when Ronan demands he comes with her & then the random appearance of Bastian, she is feeling very overwhelmed.
After she chooses to fall with them, they land on earth exactly where Gabe is located only to run into Steele who is a person that I was finding hard to like.
After training, she eventually finds out she does have an affinity & it’s one that no longer exist & is incredibly powerful but also has a prophecy attached to it.
I feel incredibly bad for her on she learns about the prophecy & Steele’s connection with it too.
But that ending, with the battle scene & Niz….yeah definitely was not expecting that but hello I am all here for it too!
Absolutely amazing start of a series & I for sure will be waiting for the next one to come out.
Amazing job!
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Reviewed in the United States on September 26, 2024
★★★★★ 5
So good!
Format: Kindle
Wings of Stars was a fantastic first book to a new series. It grabbed me in its clutches within the first chapter and kept ahold of me.
This new world of M Sinclair and RL Caulder’s is all about angels and mythical creatures. It’s full of drama from all points. From Kieran’s awful home life to keeping the stars alive and everything in between.
Kieran is our FMC and despite everything she keeps her spirit and defiance.
Keeping to their norm, there is a group of guys for our FMC but they definitely aren’t established yet, and not fully cemented yet into being a group rather than her choosing between them.
Ronan is so sweet and gives off Daddy vibes
Gabe is also sweet and wants the best of everything for Kieran and will defend her against anyone
Bastian is slightly unhinged but I loved him immediately
Steele is a jerk… just as you find redeeming qualities, he screws up again… but yet I still want him to redeem himself.
There’s another one… but if I gave his name I would be spoiling a plot twist so you will just have to find out yourself… but you’ll love him as much as I do.
This is a slow burn but the little bit of spice we do get is hot, especially with the dirty talk.
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Reviewed in the United States on February 19, 2024
★★★★★ 5
Angels and the Fallen — Breathtaking Start
Format: Kindle
This book was EVERYTHING I expected it to be and more. Leave to R.L. Caulder and M. Sinclair to give us yet another amazing book!
Kieran and her guys hooked me from the very beginning and did not let go. Found family is one of my favorite tropes and it was done so well in this book. Couple that along with an FMC trying to find her place in the world and I was practically drooling over this book. The world building, the conflict, the wyverin sidekick — it all was done so well that it felt fresh and real.
Each love interest felt real and unique in their own ways. I felt connected to each one and like they were truly different people. I love that so much in a book and these two authors never miss with their love interests.
Multi POV, Reverse harem, who did this to you, and a magical world highlighting the angels and the fallen. This book has everything and it does it so well.
Big thank you to R.L. Caulder and M. Sinclair for the arc copy! I cannot wait for book 2!
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Reviewed in the United States on February 20, 2024
★★★★★ 4
A new take 🤔
Format: Kindle
I’m not going to go into what this book is about — by now you e already read the synopsis and have an idea — but I will give a couple of insights.
Definitely a different take on angels and their fall; I like it. This is an interesting start to a new series - YES, this does end on a cliffhanger so be prepared for that. I’m eager for the next book (and hopefully the last in this series — sometimes the author(s) will switch it up depending on how the story flows for them) in this series.
I’m hoping that a certain male character redeems himself because he’s a dick that will make the meaning of mixed signals jealous lol.
You ever watch that old movie — I think it’s call Mommy Dearest? — yea, let’s switch that up to daddy. That man would make a perfect husband to mommy dearest.
I recommend this book because while these authors are well known for their cliffhangers, they are also well known for putting out good stories.
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Reviewed in the United States on February 19, 2024
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