February 08, 2021Audio Product Reviews

SMSL SP400 vs TOPPING A90 Comparison Chart

Buying a desktop amp may be harder than ever now that benchmark quality can be attained for under $1000. To make your research easier, we’ve created a comparison chart for two amps that ought to be in your contenders list: the TOPPING A90 Headphone Amp and the SMSL SP400 Headphone Amp. Both amps are available right here on Apos, so if you have any questions about either amp feel free to reach out to our Support Team.


	TOPPING A90 Headphone Amp	SMSL SP400 Headphone Amp
Price	$499	$629
Dimensions	8.7 x 6.2 x 1.7”	8.66 x 8.4 x 1.69”
Weight	7.7lbs	2.9lbs
Inputs	XLR RCA	XLR RCA
Outputs	Balanced XLR Balanced 4.4 Single-ended 6.35	Balanced XLR Single-ended 6.35
Amplifier	Nested Feedback Composite Amplifier	THX AAA-888
THD+N	<0.00006%	<0.00006%
SNR	145dB	133dB
Gain Settings	3	3
Output Power	7600mWx2 @16Ω	12W x2 @16Ω
Output Impedance	<0.1Ω	Near 0Ω
Influencer Sound Opinion: Z Reviews	“How good is the TOPPING A90? Fucking good. Fucking real good.” “This beats [the THX 789] on paper. There is at least a transparent difference between [the A90] and [the THX 789].” “I really like this amplifier. It really does all that crazy bullshit it’s talking about.”	“If you’re a THX fanboy, this is the best THX amplifier I’ve ever heard.” “It’s worth its cost. That’s all I gotta say.” “If you’re looking for $2,500 benchmark amp performance for $630, there you go.” “The A90 is still the $500 choice. This is a comparable choice...but I like the analog controls of the A90 better.”
Apos Audio Customer Reviews	Take a look at the community reviews: TOPPING A90 Headphone Amp	Take a look at the community reviews: SMSL SP400 Headphone Amp