Uploaded February 2025 | Updated September 2026, 2 weeks ago
Do you need a preamp that won’t break the bank to add a little more functionality to your system? You might consider Fosi’s new P4 model. I found it to be surprisingly useful in my stereo setup.
Thanks to Fosi for sending this unit out for review.
Links to products in the video (some affiliate):
Early Bird 25% off code: FOSIP425(valid from 2.20-2.27 only)
Landing page on official site: bit.ly/42XsIsn
Purchase page on official site: bit.ly/4jWB0qJ
Amazon US: amzn.to/4gLWvI0
eBay: bit.ly/3CHHOI4
Aliexpress: https://s.click.aliexpress.com/e/_ol3UhQg
Fosi GR40: amzn.to/41kEBHW
Fosi ZD3: amzn.to/41hb4yC
Fosi ZA3: amzn.to/4k2wsyZ
Sparkos OpAmps: sparkoslabs.com/discrete-op-amps
Of course, I always recommend you take a look at the used market, below are some sites that are great for that.
Head-Fi: head-fi.org
HifiGuides: forum.hifiguides.com
Reddit: reddit.com/r/AVexchange
Hifi-shark: hifishark.com
US AudioMart: usaudiomart.com
Some of my favorite equipment for various niches (some links are affiliate):
7hz Saltones Zero: amzn.to/3VrQG8A
Kiwi Ears Cadenza: amzn.to/3Z1LcnT
Fav IEM: Blessing 3: Meze Alba: amzn.to/3BUphrh
Cheap Open-Gaming Headphone: AD700X: amzn.to/3b4ACUS
Super Cheap Closed-Back Gaming: Recon 500: amzn.to/3numqem
Cheap All-Around Headphone: SHP9600: amzn.to/3b6aUiP
Quicksilver Headphone Amp: quicksilveraudio.com/products/headphone-amplifier
JM Audio XTC Closed: jmaudioeditions.com/product-page/jm-audio-editions-x-t-c-closed-bio-wool-50mm-n52-magnet
Gaming Headphone (wired): DT 900 Pro X: amzn.to/3Hkw1hj
Gaming Headphone Wireless: Audeze Maxwell: amzn.to/3KCwrlr
Budget Bluetooth Portable DAC/Amp: BTR7: bit.ly/ayritaposbtr7
Topping G5: amzn.to/44hr43z
Budget Dongle: Dawn Pro: Moondrop Dawn Pro: bit.ly/ayritaposdawnpro
Wired Portable DAC/Amp: Cayin RU6: bit.ly/ayritru6
Cheap Desktop DAC/Amp: Fiio K11 R2R: bit.ly/ayritaposk11r2r
Budget Friendly Clean/Linear DAC/Amp: Look for used JDS labs Element III
JDS Labs Element IV: jdslabs.com/product/element-iv
Budget TWS: Soundcore Space A40: amzn.to/3KRAknx
Go to TWS: Airpods Pro 2: amzn.to/40aFtOI
Hifiman Edition XS: bit.ly/ayritaposeditionxs
Hifiman Ananda Nano: bit.ly/ayritaposanandanano
Hifiman Arya Organic: bit.ly/ayritaposaryaorg
Hifiman HE1000se: store.hifiman.com/index.php/he1000se-refurbished.html
Main Home Theater / Hifi Stereo Setup:
Soncoz SGD1: amzn.to/3DnaHpQ
FOSI ZA3 (2 in mono): amzn.to/3wJCSyQ
Sparkos Op-Amps: sparkoslabs.com/?sscid=41k8_p4st5&gad_source=1
Emotiva T0+: emotiva.com/products/airmotiv-t0-pair
Jamo C10 Sub: amzn.to/3xmdaRg
DIY 12” Passive Sub
Sub Amp: Aiyma A07: amzn.to/3YocZ0f
Upstairs:
Fosi ZD3: amzn.to/3PVuLW9
JBL306P MKII: amzn.to/3wsdCNR
Bedroom Home Theater / Hifi Stereo Setup:
Acrylic BP50: amzn.to/3Efu3R3
Fosi HDA1:
Elac 4” Passive:amzn.to/3HEpkHN
Cables:
Hart Audio Cables: hartaudiocables.com
Worlds Best RCA Interconnects: amzn.to/3pB2Oa7
Worlds Best XLR Interconnects: amzn.to/3vEdwxO
4.4 to XLR Balanced Cable: amzn.to/3UxF83G
3.5 to RCA Cable: amzn.to/3S0x7CF
Recording Gear:
Canon EOS RP: amzn.to/42UuVms
RF 50mm: amzn.to/42AaWeG
DJI Action 4: amzn.to/40E58OR
DJI Mic Mini 2: amzn.to/4hBDFUA
Current Desktop Set Up:
Alesis Elevate 5 MKII: amzn.to/3TtU30h
JDS Labs Element III: bit.ly/ayritjdseliii
JM Audio XTC Closed: jmaudioeditions.com/product-page/jm-audio-editions-x-t-c-closed-bio-wool-50mm-n52-magnet
#fosi #p4 #preamp
Do you need a preamp that won’t break the bank to add a little more functionality to your system? You might consider Fosi’s new P4 model. I found it to be surprisingly useful in my stereo setup.
Thanks to Fosi for sending this unit out for review.
Links to products in the video (some affiliate):
Early Bird 25% off code: FOSIP425(valid from 2.20-2.27 only)
Landing page on official site: bit.ly/42XsIsn
Purchase page on official site: bit.ly/4jWB0qJ
Amazon US: amzn.to/4gLWvI0
eBay: bit.ly/3CHHOI4
Aliexpress: https://s.click.aliexpress.com/e/_ol3UhQg
Fosi GR40: amzn.to/41kEBHW
Fosi ZD3: amzn.to/41hb4yC
Fosi ZA3: amzn.to/4k2wsyZ
Sparkos OpAmps: sparkoslabs.com/discrete-op-amps
Of course, I always recommend you take a look at the used market, below are some sites that are great for that.
Head-Fi: head-fi.org
HifiGuides: forum.hifiguides.com
Reddit: reddit.com/r/AVexchange
Hifi-shark: hifishark.com
US AudioMart: usaudiomart.com
Some of my favorite equipment for various niches (some links are affiliate):
7hz Saltones Zero: amzn.to/3VrQG8A
Kiwi Ears Cadenza: amzn.to/3Z1LcnT
Fav IEM: Blessing 3: Meze Alba: amzn.to/3BUphrh
Cheap Open-Gaming Headphone: AD700X: amzn.to/3b4ACUS
Super Cheap Closed-Back Gaming: Recon 500: amzn.to/3numqem
Cheap All-Around Headphone: SHP9600: amzn.to/3b6aUiP
Quicksilver Headphone Amp: quicksilveraudio.com/products/headphone-amplifier
JM Audio XTC Closed: jmaudioeditions.com/product-page/jm-audio-editions-x-t-c-closed-bio-wool-50mm-n52-magnet
Gaming Headphone (wired): DT 900 Pro X: amzn.to/3Hkw1hj
Gaming Headphone Wireless: Audeze Maxwell: amzn.to/3KCwrlr
Budget Bluetooth Portable DAC/Amp: BTR7: bit.ly/ayritaposbtr7
Topping G5: amzn.to/44hr43z
Budget Dongle: Dawn Pro: Moondrop Dawn Pro: bit.ly/ayritaposdawnpro
Wired Portable DAC/Amp: Cayin RU6: bit.ly/ayritru6
Cheap Desktop DAC/Amp: Fiio K11 R2R: bit.ly/ayritaposk11r2r
Budget Friendly Clean/Linear DAC/Amp: Look for used JDS labs Element III
JDS Labs Element IV: jdslabs.com/product/element-iv
Budget TWS: Soundcore Space A40: amzn.to/3KRAknx
Go to TWS: Airpods Pro 2: amzn.to/40aFtOI
Hifiman Edition XS: bit.ly/ayritaposeditionxs
Hifiman Ananda Nano: bit.ly/ayritaposanandanano
Hifiman Arya Organic: bit.ly/ayritaposaryaorg
Hifiman HE1000se: store.hifiman.com/index.php/he1000se-refurbished.html
Main Home Theater / Hifi Stereo Setup:
Soncoz SGD1: amzn.to/3DnaHpQ
FOSI ZA3 (2 in mono): amzn.to/3wJCSyQ
Sparkos Op-Amps: sparkoslabs.com/?sscid=41k8_p4st5&gad_source=1
Emotiva T0+: emotiva.com/products/airmotiv-t0-pair
Jamo C10 Sub: amzn.to/3xmdaRg
DIY 12” Passive Sub
Sub Amp: Aiyma A07: amzn.to/3YocZ0f
Upstairs:
Fosi ZD3: amzn.to/3PVuLW9
JBL306P MKII: amzn.to/3wsdCNR
Bedroom Home Theater / Hifi Stereo Setup:
Acrylic BP50: amzn.to/3Efu3R3
Fosi HDA1:
Elac 4” Passive:amzn.to/3HEpkHN
Cables:
Hart Audio Cables: hartaudiocables.com
Worlds Best RCA Interconnects: amzn.to/3pB2Oa7
Worlds Best XLR Interconnects: amzn.to/3vEdwxO
4.4 to XLR Balanced Cable: amzn.to/3UxF83G
3.5 to RCA Cable: amzn.to/3S0x7CF
Recording Gear:
Canon EOS RP: amzn.to/42UuVms
RF 50mm: amzn.to/42AaWeG
DJI Action 4: amzn.to/40E58OR
DJI Mic Mini 2: amzn.to/4hBDFUA
Current Desktop Set Up:
Alesis Elevate 5 MKII: amzn.to/3TtU30h
JDS Labs Element III: bit.ly/ayritjdseliii
JM Audio XTC Closed: jmaudioeditions.com/product-page/jm-audio-editions-x-t-c-closed-bio-wool-50mm-n52-magnet
#fosi #p4 #preamp
